feat: add product domain and machine integration

- extend Prisma schema with products, product constructs and link tables\n- introduce product service, DTOs and includes with constructeur support\n- integrate product selections across model type skeletons, composants, pièces and machines\n- validate product requirements when building machine skeletons and payloads

prisma/migrations/20250930130000_enforce_unique_names/migration.sql

@@ -0,0 +1,16 @@
+-- Drop previous non-unique index to replace it with a unique constraint
+DROP INDEX IF EXISTS "ModelType_category_name_idx";
+
+-- Ensure unique names for machines, components, and pieces
+ALTER TABLE "machines"
+  ADD CONSTRAINT "machines_name_key" UNIQUE ("name");
+
+ALTER TABLE "composants"
+  ADD CONSTRAINT "composants_name_key" UNIQUE ("name");
+
+ALTER TABLE "pieces"
+  ADD CONSTRAINT "pieces_name_key" UNIQUE ("name");
+
+-- Enforce unique category/name pairs for model types (component & piece categories)
+ALTER TABLE "ModelType"
+  ADD CONSTRAINT "ModelType_category_name_key" UNIQUE ("category", "name");

prisma/migrations/20250930134500_add_requirement_order/migration.sql

@@ -0,0 +1,27 @@
+ALTER TABLE "type_machine_component_requirements"
+ADD COLUMN "orderIndex" INTEGER NOT NULL DEFAULT 0;
+
+ALTER TABLE "type_machine_piece_requirements"
+ADD COLUMN "orderIndex" INTEGER NOT NULL DEFAULT 0;
+
+WITH ordered_component_requirements AS (
+  SELECT
+    id,
+    ROW_NUMBER() OVER (PARTITION BY "typeMachineId" ORDER BY "createdAt") - 1 AS idx
+  FROM "type_machine_component_requirements"
+)
+UPDATE "type_machine_component_requirements" t
+SET "orderIndex" = ordered_component_requirements.idx
+FROM ordered_component_requirements
+WHERE ordered_component_requirements.id = t.id;
+
+WITH ordered_piece_requirements AS (
+  SELECT
+    id,
+    ROW_NUMBER() OVER (PARTITION BY "typeMachineId" ORDER BY "createdAt") - 1 AS idx
+  FROM "type_machine_piece_requirements"
+)
+UPDATE "type_machine_piece_requirements" t
+SET "orderIndex" = ordered_piece_requirements.idx
+FROM ordered_piece_requirements
+WHERE ordered_piece_requirements.id = t.id;

prisma/migrations/20251106120000_multi_constructeurs/migration.sql

@@ -0,0 +1,64 @@
+-- Convert single constructeur relation to many-to-many for machines, composants et pièces
+
+-- Machines → Constructeurs
+ALTER TABLE "machines" DROP CONSTRAINT IF EXISTS "machines_constructeurId_fkey";
+
+CREATE TABLE "_MachineConstructeurs" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_MachineConstructeurs_A_fkey" FOREIGN KEY ("A") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_MachineConstructeurs_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX "_MachineConstructeurs_AB_unique" ON "_MachineConstructeurs"("A", "B");
+CREATE INDEX "_MachineConstructeurs_B_index" ON "_MachineConstructeurs"("B");
+
+INSERT INTO "_MachineConstructeurs" ("A", "B")
+SELECT "id", "constructeurId"
+FROM "machines"
+WHERE "constructeurId" IS NOT NULL
+ON CONFLICT DO NOTHING;
+
+ALTER TABLE "machines" DROP COLUMN IF EXISTS "constructeurId";
+
+-- Composants → Constructeurs
+ALTER TABLE "composants" DROP CONSTRAINT IF EXISTS "composants_constructeurId_fkey";
+
+CREATE TABLE "_ComposantConstructeurs" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_ComposantConstructeurs_A_fkey" FOREIGN KEY ("A") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_ComposantConstructeurs_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX "_ComposantConstructeurs_AB_unique" ON "_ComposantConstructeurs"("A", "B");
+CREATE INDEX "_ComposantConstructeurs_B_index" ON "_ComposantConstructeurs"("B");
+
+INSERT INTO "_ComposantConstructeurs" ("A", "B")
+SELECT "id", "constructeurId"
+FROM "composants"
+WHERE "constructeurId" IS NOT NULL
+ON CONFLICT DO NOTHING;
+
+ALTER TABLE "composants" DROP COLUMN IF EXISTS "constructeurId";
+
+-- Pièces → Constructeurs
+ALTER TABLE "pieces" DROP CONSTRAINT IF EXISTS "pieces_constructeurId_fkey";
+
+CREATE TABLE "_PieceConstructeurs" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_PieceConstructeurs_A_fkey" FOREIGN KEY ("A") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_PieceConstructeurs_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX "_PieceConstructeurs_AB_unique" ON "_PieceConstructeurs"("A", "B");
+CREATE INDEX "_PieceConstructeurs_B_index" ON "_PieceConstructeurs"("B");
+
+INSERT INTO "_PieceConstructeurs" ("A", "B")
+SELECT "id", "constructeurId"
+FROM "pieces"
+WHERE "constructeurId" IS NOT NULL
+ON CONFLICT DO NOTHING;
+
+ALTER TABLE "pieces" DROP COLUMN IF EXISTS "constructeurId";

prisma/migrations/20251107120000_fix_constructeur_join_tables/migration.sql

@@ -0,0 +1,66 @@
+-- Fix the orientation of implicit many-to-many join tables between constructeurs
+-- and machines/composants/pièces so that Prisma inserts target IDs into the
+-- matching foreign key columns.
+
+-- Machines ↔ Constructeurs
+CREATE TABLE "_MachineConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_MachineConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_MachineConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_MachineConstructeurs_new" ("A", "B")
+SELECT "B", "A"
+FROM "_MachineConstructeurs";
+
+DROP TABLE "_MachineConstructeurs";
+
+ALTER TABLE "_MachineConstructeurs_new" RENAME TO "_MachineConstructeurs";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_A_fkey" TO "_MachineConstructeurs_A_fkey";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_B_fkey" TO "_MachineConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_MachineConstructeurs_AB_unique" ON "_MachineConstructeurs"("A", "B");
+CREATE INDEX "_MachineConstructeurs_B_index" ON "_MachineConstructeurs"("B");
+
+-- Composants ↔ Constructeurs
+CREATE TABLE "_ComposantConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_ComposantConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_ComposantConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_ComposantConstructeurs_new" ("A", "B")
+SELECT "B", "A"
+FROM "_ComposantConstructeurs";
+
+DROP TABLE "_ComposantConstructeurs";
+
+ALTER TABLE "_ComposantConstructeurs_new" RENAME TO "_ComposantConstructeurs";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_A_fkey" TO "_ComposantConstructeurs_A_fkey";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_B_fkey" TO "_ComposantConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_ComposantConstructeurs_AB_unique" ON "_ComposantConstructeurs"("A", "B");
+CREATE INDEX "_ComposantConstructeurs_B_index" ON "_ComposantConstructeurs"("B");
+
+-- Pièces ↔ Constructeurs
+CREATE TABLE "_PieceConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_PieceConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_PieceConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_PieceConstructeurs_new" ("A", "B")
+SELECT "B", "A"
+FROM "_PieceConstructeurs";
+
+DROP TABLE "_PieceConstructeurs";
+
+ALTER TABLE "_PieceConstructeurs_new" RENAME TO "_PieceConstructeurs";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_A_fkey" TO "_PieceConstructeurs_A_fkey";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_B_fkey" TO "_PieceConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_PieceConstructeurs_AB_unique" ON "_PieceConstructeurs"("A", "B");
+CREATE INDEX "_PieceConstructeurs_B_index" ON "_PieceConstructeurs"("B");

prisma/migrations/20251107130000_restore_machine_composant_orientation/migration.sql

@@ -0,0 +1,45 @@
+-- Restore the original orientation of the machine/composant ↔ constructeur
+-- implicit join tables after the previous corrective migration, while keeping
+-- the pièce ↔ constructeur table aligned with Prisma's expectations.
+
+-- Machines ↔ Constructeurs must map column A → machine, B → constructeur
+CREATE TABLE "_MachineConstructeurs_restored" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_MachineConstructeurs_restored_A_fkey" FOREIGN KEY ("A") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_MachineConstructeurs_restored_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_MachineConstructeurs_restored" ("A", "B")
+SELECT "B", "A"
+FROM "_MachineConstructeurs";
+
+DROP TABLE "_MachineConstructeurs";
+
+ALTER TABLE "_MachineConstructeurs_restored" RENAME TO "_MachineConstructeurs";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_restored_A_fkey" TO "_MachineConstructeurs_A_fkey";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_restored_B_fkey" TO "_MachineConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_MachineConstructeurs_AB_unique" ON "_MachineConstructeurs"("A", "B");
+CREATE INDEX "_MachineConstructeurs_B_index" ON "_MachineConstructeurs"("B");
+
+-- Composants ↔ Constructeurs must map column A → composant, B → constructeur
+CREATE TABLE "_ComposantConstructeurs_restored" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_ComposantConstructeurs_restored_A_fkey" FOREIGN KEY ("A") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_ComposantConstructeurs_restored_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_ComposantConstructeurs_restored" ("A", "B")
+SELECT "B", "A"
+FROM "_ComposantConstructeurs";
+
+DROP TABLE "_ComposantConstructeurs";
+
+ALTER TABLE "_ComposantConstructeurs_restored" RENAME TO "_ComposantConstructeurs";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_restored_A_fkey" TO "_ComposantConstructeurs_A_fkey";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_restored_B_fkey" TO "_ComposantConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_ComposantConstructeurs_AB_unique" ON "_ComposantConstructeurs"("A", "B");
+CREATE INDEX "_ComposantConstructeurs_B_index" ON "_ComposantConstructeurs"("B");

prisma/migrations/20251107140000_custom_field_order/migration.sql

@@ -0,0 +1,18 @@
+-- Introduce an order index for custom fields so their ordering can be persisted.
+
+ALTER TABLE "custom_fields"
+ADD COLUMN "orderIndex" INTEGER NOT NULL DEFAULT 0;
+
+WITH ranked AS (
+  SELECT
+    "id",
+    ROW_NUMBER() OVER (
+      PARTITION BY "typeMachineId", "typeComposantId", "typePieceId"
+      ORDER BY "createdAt", "id"
+    ) - 1 AS rn
+  FROM "custom_fields"
+)
+UPDATE "custom_fields"
+SET "orderIndex" = ranked.rn
+FROM ranked
+WHERE ranked."id" = "custom_fields"."id";

prisma/migrations/20251107162000_prune_orphan_constructeur_links/migration.sql

@@ -0,0 +1,14 @@
+-- Remove constructeur link rows that reference missing parents or constructeur records.
+-- This prevents foreign key violations when the orientation of the join tables is normalized.
+
+DELETE FROM "_MachineConstructeurs"
+WHERE "A" NOT IN (SELECT "id" FROM "machines")
+   OR "B" NOT IN (SELECT "id" FROM "constructeurs");
+
+DELETE FROM "_ComposantConstructeurs"
+WHERE "A" NOT IN (SELECT "id" FROM "composants")
+   OR "B" NOT IN (SELECT "id" FROM "constructeurs");
+
+DELETE FROM "_PieceConstructeurs"
+WHERE "A" NOT IN (SELECT "id" FROM "pieces")
+   OR "B" NOT IN (SELECT "id" FROM "constructeurs");

prisma/migrations/20251107163000_restore_constructeur_join_tables_orientation/migration.sql

@@ -0,0 +1,72 @@
+-- Restore the implicit many-to-many join table orientation between constructeurs
+-- and machines/composants/pièces so Prisma nested writes keep using the expected
+-- foreign key columns (A → constructeur, B → parent record).
+
+-- Machines ↔ Constructeurs
+CREATE TABLE "_MachineConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_MachineConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_MachineConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_MachineConstructeurs_new" ("A", "B")
+SELECT mc."B", mc."A"
+FROM "_MachineConstructeurs" mc
+JOIN "machines" m ON mc."B" = m."id"
+JOIN "constructeurs" c ON mc."A" = c."id";
+
+DROP TABLE "_MachineConstructeurs";
+
+ALTER TABLE "_MachineConstructeurs_new" RENAME TO "_MachineConstructeurs";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_A_fkey" TO "_MachineConstructeurs_A_fkey";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_B_fkey" TO "_MachineConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_MachineConstructeurs_AB_unique" ON "_MachineConstructeurs"("A", "B");
+CREATE INDEX "_MachineConstructeurs_B_index" ON "_MachineConstructeurs"("B");
+
+-- Composants ↔ Constructeurs
+CREATE TABLE "_ComposantConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_ComposantConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_ComposantConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_ComposantConstructeurs_new" ("A", "B")
+SELECT cc."B", cc."A"
+FROM "_ComposantConstructeurs" cc
+JOIN "composants" comp ON cc."B" = comp."id"
+JOIN "constructeurs" c ON cc."A" = c."id";
+
+DROP TABLE "_ComposantConstructeurs";
+
+ALTER TABLE "_ComposantConstructeurs_new" RENAME TO "_ComposantConstructeurs";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_A_fkey" TO "_ComposantConstructeurs_A_fkey";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_B_fkey" TO "_ComposantConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_ComposantConstructeurs_AB_unique" ON "_ComposantConstructeurs"("A", "B");
+CREATE INDEX "_ComposantConstructeurs_B_index" ON "_ComposantConstructeurs"("B");
+
+-- Pièces ↔ Constructeurs
+CREATE TABLE "_PieceConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_PieceConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_PieceConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_PieceConstructeurs_new" ("A", "B")
+SELECT pc."B", pc."A"
+FROM "_PieceConstructeurs" pc
+JOIN "pieces" p ON pc."B" = p."id"
+JOIN "constructeurs" c ON pc."A" = c."id";
+
+DROP TABLE "_PieceConstructeurs";
+
+ALTER TABLE "_PieceConstructeurs_new" RENAME TO "_PieceConstructeurs";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_A_fkey" TO "_PieceConstructeurs_A_fkey";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_B_fkey" TO "_PieceConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_PieceConstructeurs_AB_unique" ON "_PieceConstructeurs"("A", "B");
+CREATE INDEX "_PieceConstructeurs_B_index" ON "_PieceConstructeurs"("B");

prisma/migrations/20251107171000_normalize_constructeur_join_tables/migration.sql

@@ -0,0 +1,73 @@
+-- Ensure implicit many-to-many join tables between machines/composants/pièces
+-- and constructeurs follow Prisma's expected orientation:
+--   A -> parent model (machines/composants/pièces)
+--   B -> constructeurs
+
+-- Machines ↔ Constructeurs
+CREATE TABLE "_MachineConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_MachineConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_MachineConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_MachineConstructeurs_new" ("A", "B")
+SELECT mc."B", mc."A"
+FROM "_MachineConstructeurs" mc
+JOIN "machines" m ON mc."B" = m."id"
+JOIN "constructeurs" c ON mc."A" = c."id";
+
+DROP TABLE "_MachineConstructeurs";
+
+ALTER TABLE "_MachineConstructeurs_new" RENAME TO "_MachineConstructeurs";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_A_fkey" TO "_MachineConstructeurs_A_fkey";
+ALTER TABLE "_MachineConstructeurs" RENAME CONSTRAINT "_MachineConstructeurs_new_B_fkey" TO "_MachineConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_MachineConstructeurs_AB_unique" ON "_MachineConstructeurs"("A", "B");
+CREATE INDEX "_MachineConstructeurs_B_index" ON "_MachineConstructeurs"("B");
+
+-- Composants ↔ Constructeurs
+CREATE TABLE "_ComposantConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_ComposantConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_ComposantConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_ComposantConstructeurs_new" ("A", "B")
+SELECT cc."B", cc."A"
+FROM "_ComposantConstructeurs" cc
+JOIN "composants" comp ON cc."B" = comp."id"
+JOIN "constructeurs" c ON cc."A" = c."id";
+
+DROP TABLE "_ComposantConstructeurs";
+
+ALTER TABLE "_ComposantConstructeurs_new" RENAME TO "_ComposantConstructeurs";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_A_fkey" TO "_ComposantConstructeurs_A_fkey";
+ALTER TABLE "_ComposantConstructeurs" RENAME CONSTRAINT "_ComposantConstructeurs_new_B_fkey" TO "_ComposantConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_ComposantConstructeurs_AB_unique" ON "_ComposantConstructeurs"("A", "B");
+CREATE INDEX "_ComposantConstructeurs_B_index" ON "_ComposantConstructeurs"("B");
+
+-- Pièces ↔ Constructeurs
+CREATE TABLE "_PieceConstructeurs_new" (
+  "A" TEXT NOT NULL,
+  "B" TEXT NOT NULL,
+  CONSTRAINT "_PieceConstructeurs_new_A_fkey" FOREIGN KEY ("A") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT "_PieceConstructeurs_new_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+INSERT INTO "_PieceConstructeurs_new" ("A", "B")
+SELECT pc."B", pc."A"
+FROM "_PieceConstructeurs" pc
+JOIN "pieces" p ON pc."B" = p."id"
+JOIN "constructeurs" c ON pc."A" = c."id";
+
+DROP TABLE "_PieceConstructeurs";
+
+ALTER TABLE "_PieceConstructeurs_new" RENAME TO "_PieceConstructeurs";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_A_fkey" TO "_PieceConstructeurs_A_fkey";
+ALTER TABLE "_PieceConstructeurs" RENAME CONSTRAINT "_PieceConstructeurs_new_B_fkey" TO "_PieceConstructeurs_B_fkey";
+
+CREATE UNIQUE INDEX "_PieceConstructeurs_AB_unique" ON "_PieceConstructeurs"("A", "B");
+CREATE INDEX "_PieceConstructeurs_B_index" ON "_PieceConstructeurs"("B");

prisma/migrations/20251108120000_add_products/migration.sql

@@ -0,0 +1,75 @@
+-- AlterEnum
+ALTER TYPE "ModelCategory" ADD VALUE IF NOT EXISTS 'PRODUCT';
+
+-- AlterTable
+ALTER TABLE "ModelType" ADD COLUMN "productSkeleton" JSONB;
+
+ALTER TABLE "composants" ADD COLUMN "productId" TEXT;
+
+ALTER TABLE "pieces" ADD COLUMN "productId" TEXT;
+
+ALTER TABLE "documents" ADD COLUMN "productId" TEXT;
+
+ALTER TABLE "custom_fields" ADD COLUMN "typeProductId" TEXT;
+
+ALTER TABLE "custom_field_values" ADD COLUMN "productId" TEXT;
+
+-- CreateTable
+CREATE TABLE "products" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "reference" TEXT,
+    "supplierPrice" DECIMAL(10,2),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "typeProductId" TEXT,
+
+    CONSTRAINT "products_pkey" PRIMARY KEY ("id")
+);
+
+CREATE TABLE "type_machine_product_requirements" (
+    "id" TEXT NOT NULL,
+    "label" TEXT,
+    "minCount" INTEGER NOT NULL DEFAULT 0,
+    "maxCount" INTEGER,
+    "required" BOOLEAN NOT NULL DEFAULT false,
+    "allowNewModels" BOOLEAN NOT NULL DEFAULT true,
+    "orderIndex" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "typeMachineId" TEXT NOT NULL,
+    "typeProductId" TEXT NOT NULL,
+
+    CONSTRAINT "type_machine_product_requirements_pkey" PRIMARY KEY ("id")
+);
+
+CREATE TABLE "_ProductConstructeurs" (
+    "A" TEXT NOT NULL,
+    "B" TEXT NOT NULL
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "products_name_key" ON "products"("name");
+
+CREATE UNIQUE INDEX "_ProductConstructeurs_AB_unique" ON "_ProductConstructeurs"("A", "B");
+CREATE INDEX "_ProductConstructeurs_B_index" ON "_ProductConstructeurs"("B");
+
+-- AddForeignKey
+ALTER TABLE "products" ADD CONSTRAINT "products_typeProductId_fkey" FOREIGN KEY ("typeProductId") REFERENCES "ModelType"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "composants" ADD CONSTRAINT "composants_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "pieces" ADD CONSTRAINT "pieces_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "documents" ADD CONSTRAINT "documents_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "custom_fields" ADD CONSTRAINT "custom_fields_typeProductId_fkey" FOREIGN KEY ("typeProductId") REFERENCES "ModelType"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "custom_field_values" ADD CONSTRAINT "custom_field_values_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "type_machine_product_requirements" ADD CONSTRAINT "type_machine_product_requirements_typeMachineId_fkey" FOREIGN KEY ("typeMachineId") REFERENCES "type_machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "type_machine_product_requirements" ADD CONSTRAINT "type_machine_product_requirements_typeProductId_fkey" FOREIGN KEY ("typeProductId") REFERENCES "ModelType"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "_ProductConstructeurs" ADD CONSTRAINT "_ProductConstructeurs_A_fkey" FOREIGN KEY ("A") REFERENCES "products"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "_ProductConstructeurs" ADD CONSTRAINT "_ProductConstructeurs_B_fkey" FOREIGN KEY ("B") REFERENCES "constructeurs"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20251108131000_add_machine_product_links/migration.sql

@@ -0,0 +1,26 @@
+-- CreateTable
+CREATE TABLE "machine_product_links" (
+    "id" TEXT NOT NULL,
+    "machineId" TEXT NOT NULL,
+    "productId" TEXT NOT NULL,
+    "typeMachineProductRequirementId" TEXT,
+    "parentLinkId" TEXT,
+    "parentComponentLinkId" TEXT,
+    "parentPieceLinkId" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "machine_product_links_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_typeMachineProductRequirementId_fkey" FOREIGN KEY ("typeMachineProductRequirementId") REFERENCES "type_machine_product_requirements"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_parentLinkId_fkey" FOREIGN KEY ("parentLinkId") REFERENCES "machine_product_links"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_parentComponentLinkId_fkey" FOREIGN KEY ("parentComponentLinkId") REFERENCES "machine_component_links"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "machine_product_links" ADD CONSTRAINT "machine_product_links_parentPieceLinkId_fkey" FOREIGN KEY ("parentPieceLinkId") REFERENCES "machine_piece_links"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- CreateIndex
+CREATE INDEX "machine_product_links_machineId_idx" ON "machine_product_links"("machineId");
+CREATE INDEX "machine_product_links_productId_idx" ON "machine_product_links"("productId");

prisma/schema.prisma

@@ -47,13 +47,14 @@ model TypeMachine {
   customFields          CustomField[]                     @relation("TypeMachineCustomFields")
   componentRequirements TypeMachineComponentRequirement[]
   pieceRequirements     TypeMachinePieceRequirement[]
+  productRequirements   TypeMachineProductRequirement[]
 
   @@map("type_machines")
 }
 
 model Machine {
   id        String   @id @default(cuid())
-  name      String
+  name      String   @unique
   reference String?
   prix      Decimal? @db.Decimal(10, 2)
   createdAt DateTime @default(now())
@@ -66,11 +67,11 @@ model Machine {
   typeMachineId String?
   typeMachine   TypeMachine? @relation(fields: [typeMachineId], references: [id])
 
-  constructeurId String?
-  constructeur   Constructeur? @relation(fields: [constructeurId], references: [id], onDelete: SetNull)
+  constructeurs Constructeur[] @relation("MachineConstructeurs")
 
   componentLinks    MachineComponentLink[]
   pieceLinks        MachinePieceLink[]
+  productLinks     MachineProductLink[]
   documents         Document[]             @relation("MachineDocuments")
   customFieldValues CustomFieldValue[]     @relation("MachineCustomFieldValues")
 
@@ -79,7 +80,7 @@ model Machine {
 
 model Composant {
   id        String   @id @default(cuid())
-  name      String
+  name      String   @unique
   reference String?
   prix      Decimal? @db.Decimal(10, 2)
   createdAt DateTime @default(now())
@@ -89,8 +90,10 @@ model Composant {
   typeComposantId String?
   typeComposant   ModelType? @relation("ModelTypeComponentAssignments", fields: [typeComposantId], references: [id])
 
-  constructeurId String?
-  constructeur   Constructeur? @relation(fields: [constructeurId], references: [id], onDelete: SetNull)
+  productId String?
+  product   Product? @relation(fields: [productId], references: [id], onDelete: SetNull)
+
+  constructeurs Constructeur[] @relation("ComposantConstructeurs")
 
   documents         Document[]             @relation("ComposantDocuments")
   customFieldValues CustomFieldValue[]     @relation("ComposantCustomFieldValues")
@@ -101,7 +104,7 @@ model Composant {
 
 model Piece {
   id        String   @id @default(cuid())
-  name      String
+  name      String   @unique
   reference String?
   prix      Decimal? @db.Decimal(10, 2)
   createdAt DateTime @default(now())
@@ -110,8 +113,10 @@ model Piece {
   typePieceId String?
   typePiece   ModelType? @relation("ModelTypePieceAssignments", fields: [typePieceId], references: [id])
 
-  constructeurId String?
-  constructeur   Constructeur? @relation(fields: [constructeurId], references: [id], onDelete: SetNull)
+  productId String?
+  product   Product? @relation(fields: [productId], references: [id], onDelete: SetNull)
+
+  constructeurs Constructeur[] @relation("PieceConstructeurs")
 
   documents         Document[]         @relation("PieceDocuments")
   customFieldValues CustomFieldValue[] @relation("PieceCustomFieldValues")
@@ -120,6 +125,27 @@ model Piece {
   @@map("pieces")
 }
 
+model Product {
+  id            String   @id @default(cuid())
+  name          String   @unique
+  reference     String?
+  supplierPrice Decimal? @db.Decimal(10, 2)
+  createdAt     DateTime @default(now())
+  updatedAt     DateTime @updatedAt
+
+  typeProductId String?
+  typeProduct   ModelType? @relation("ModelTypeProductAssignments", fields: [typeProductId], references: [id])
+
+  constructeurs     Constructeur[]     @relation("ProductConstructeurs")
+  documents         Document[]         @relation("ProductDocuments")
+  customFieldValues CustomFieldValue[] @relation("ProductCustomFieldValues")
+  pieces            Piece[]
+  composants        Composant[]
+  machineLinks      MachineProductLink[]
+
+  @@map("products")
+}
+
 model MachineComponentLink {
   id                                String   @id @default(cuid())
   machineId                         String
@@ -138,6 +164,7 @@ model MachineComponentLink {
   childLinks                      MachineComponentLink[]           @relation("MachineComponentLinkHierarchy")
   typeMachineComponentRequirement TypeMachineComponentRequirement? @relation("ComponentRequirementLinks", fields: [typeMachineComponentRequirementId], references: [id], onDelete: SetNull)
   pieceLinks                      MachinePieceLink[]               @relation("ComponentLinkPieceLinks")
+  productLinks                    MachineProductLink[]             @relation("ComponentLinkProductLinks")
 
   @@map("machine_component_links")
 }
@@ -158,13 +185,37 @@ model MachinePieceLink {
   piece                       Piece                        @relation(fields: [pieceId], references: [id], onDelete: Cascade)
   parentLink                  MachineComponentLink?        @relation("ComponentLinkPieceLinks", fields: [parentLinkId], references: [id], onDelete: Cascade)
   typeMachinePieceRequirement TypeMachinePieceRequirement? @relation("PieceRequirementLinks", fields: [typeMachinePieceRequirementId], references: [id], onDelete: SetNull)
+  productLinks                MachineProductLink[]         @relation("PieceLinkProductLinks")
 
   @@map("machine_piece_links")
 }
 
+model MachineProductLink {
+  id                               String   @id @default(cuid())
+  machineId                        String
+  productId                        String
+  typeMachineProductRequirementId  String?
+  parentLinkId                     String?
+  parentComponentLinkId            String?
+  parentPieceLinkId                String?
+  createdAt                        DateTime @default(now())
+  updatedAt                        DateTime @updatedAt
+
+  machine                       Machine                        @relation(fields: [machineId], references: [id], onDelete: Cascade)
+  product                       Product                        @relation(fields: [productId], references: [id], onDelete: Cascade)
+  typeMachineProductRequirement TypeMachineProductRequirement? @relation("ProductRequirementLinks", fields: [typeMachineProductRequirementId], references: [id], onDelete: SetNull)
+  parentLink                    MachineProductLink?            @relation("MachineProductLinkHierarchy", fields: [parentLinkId], references: [id], onDelete: Cascade)
+  childLinks                    MachineProductLink[]           @relation("MachineProductLinkHierarchy")
+  parentComponentLink           MachineComponentLink?          @relation("ComponentLinkProductLinks", fields: [parentComponentLinkId], references: [id], onDelete: Cascade)
+  parentPieceLink               MachinePieceLink?              @relation("PieceLinkProductLinks", fields: [parentPieceLinkId], references: [id], onDelete: Cascade)
+
+  @@map("machine_product_links")
+}
+
 enum ModelCategory {
   COMPONENT
   PIECE
+  PRODUCT
 }
 
 model ModelType {
@@ -176,17 +227,21 @@ model ModelType {
   description       String?       @db.Text
   componentSkeleton Json?
   pieceSkeleton     Json?
+  productSkeleton   Json?
   createdAt         DateTime      @default(now())
   updatedAt         DateTime      @updatedAt
 
   composants            Composant[]                       @relation("ModelTypeComponentAssignments")
   componentRequirements TypeMachineComponentRequirement[] @relation("ModelTypeComponentRequirements")
   customFields          CustomField[]                     @relation("ModelTypeCustomFields")
+  productCustomFields   CustomField[]                     @relation("ModelTypeProductCustomFields")
   pieceRequirements     TypeMachinePieceRequirement[]     @relation("ModelTypePieceRequirements")
   pieces                Piece[]                           @relation("ModelTypePieceAssignments")
   pieceCustomFields     CustomField[]                     @relation("ModelTypePieceCustomFields")
+  products              Product[]                         @relation("ModelTypeProductAssignments")
+  productRequirements   TypeMachineProductRequirement[]   @relation("ModelTypeProductRequirements")
 
-  @@index([category, name])
+  @@unique([category, name])
 }
 
 model Constructeur {
@@ -197,9 +252,10 @@ model Constructeur {
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 
-  machines   Machine[]
-  composants Composant[]
-  pieces     Piece[]
+  machines   Machine[]   @relation("MachineConstructeurs")
+  composants Composant[] @relation("ComposantConstructeurs")
+  pieces     Piece[]     @relation("PieceConstructeurs")
+  products   Product[]   @relation("ProductConstructeurs")
 
   @@map("constructeurs")
 }
@@ -235,6 +291,9 @@ model Document {
   pieceId String?
   piece   Piece?  @relation("PieceDocuments", fields: [pieceId], references: [id], onDelete: Cascade)
 
+  productId String?
+  product   Product? @relation("ProductDocuments", fields: [productId], references: [id], onDelete: Cascade)
+
   siteId String?
   site   Site?   @relation("SiteDocuments", fields: [siteId], references: [id], onDelete: Cascade)
 
@@ -248,6 +307,7 @@ model CustomField {
   required     Boolean  @default(false)
   defaultValue String?
   options      String[] // Pour les champs de type SELECT
+  orderIndex   Int      @default(0)
   createdAt    DateTime @default(now())
   updatedAt    DateTime @updatedAt
 
@@ -261,6 +321,9 @@ model CustomField {
   typePieceId String?
   typePiece   ModelType? @relation("ModelTypePieceCustomFields", fields: [typePieceId], references: [id], onDelete: Cascade)
 
+  typeProductId String?
+  typeProduct   ModelType? @relation("ModelTypeProductCustomFields", fields: [typeProductId], references: [id], onDelete: Cascade)
+
   // Relations avec les valeurs
   customFieldValues CustomFieldValue[]
 
@@ -286,6 +349,9 @@ model CustomFieldValue {
   pieceId String?
   piece   Piece?  @relation("PieceCustomFieldValues", fields: [pieceId], references: [id], onDelete: Cascade)
 
+  productId String?
+  product   Product? @relation("ProductCustomFieldValues", fields: [productId], references: [id], onDelete: Cascade)
+
   @@map("custom_field_values")
 }
 
@@ -296,6 +362,7 @@ model TypeMachineComponentRequirement {
   maxCount       Int?
   required       Boolean  @default(true)
   allowNewModels Boolean  @default(true)
+  orderIndex     Int      @default(0)
   createdAt      DateTime @default(now())
   updatedAt      DateTime @updatedAt
 
@@ -317,6 +384,7 @@ model TypeMachinePieceRequirement {
   maxCount       Int?
   required       Boolean  @default(false)
   allowNewModels Boolean  @default(true)
+  orderIndex     Int      @default(0)
   createdAt      DateTime @default(now())
   updatedAt      DateTime @updatedAt
 
@@ -330,3 +398,24 @@ model TypeMachinePieceRequirement {
 
   @@map("type_machine_piece_requirements")
 }
+
+model TypeMachineProductRequirement {
+  id             String   @id @default(cuid())
+  label          String?
+  minCount       Int      @default(0)
+  maxCount       Int?
+  required       Boolean  @default(false)
+  allowNewModels Boolean  @default(true)
+  orderIndex     Int      @default(0)
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+
+  typeMachineId String
+  typeMachine   TypeMachine @relation(fields: [typeMachineId], references: [id], onDelete: Cascade)
+
+  typeProductId String
+  typeProduct   ModelType @relation("ModelTypeProductRequirements", fields: [typeProductId], references: [id])
+  machineProductLinks MachineProductLink[] @relation("ProductRequirementLinks")
+
+  @@map("type_machine_product_requirements")
+}

scripts/seed-sample-data.ts

@@ -9,8 +9,10 @@ async function deleteExistingData() {
   await prisma.machinePieceLink.deleteMany();
   await prisma.machine.deleteMany();
   await prisma.customFieldValue.deleteMany();
+  await prisma.product.deleteMany();
   await prisma.composant.deleteMany();
   await prisma.piece.deleteMany();
+  await prisma.typeMachineProductRequirement.deleteMany();
 
   await prisma.modelType.deleteMany({
     where: {
@@ -22,6 +24,7 @@ async function deleteExistingData() {
           'cooling-module',
           'structural-frame',
           'hydraulic-power-unit',
+          'hydraulic-product',
         ],
       },
     },
@@ -120,7 +123,7 @@ async function createPiece(options: {
   name: string;
   reference: string;
   price: number;
-  constructeurId?: string | null;
+  constructeurIds?: string[] | null;
   typeId: string;
   fieldValues: Record<string, string>;
 }) {
@@ -143,17 +146,35 @@ async function createPiece(options: {
     },
   );
 
-  return prisma.piece.create({
-    data: {
-      name: options.name,
-      reference: options.reference,
-      prix: new Prisma.Decimal(options.price),
-      typePieceId: options.typeId,
-      constructeurId: options.constructeurId ?? null,
-      customFieldValues: {
-        create: customFieldValues,
-      },
+  const constructeurIds = Array.isArray(options.constructeurIds)
+    ? Array.from(
+        new Set(
+          options.constructeurIds
+            .filter((value): value is string => typeof value === 'string')
+            .map((value) => value.trim())
+            .filter((value) => value.length > 0),
+        ),
+      )
+    : [];
+
+  const data: any = {
+    name: options.name,
+    reference: options.reference,
+    prix: new Prisma.Decimal(options.price),
+    typePieceId: options.typeId,
+    customFieldValues: {
+      create: customFieldValues,
     },
+  };
+
+  if (constructeurIds.length) {
+    data.constructeurs = {
+      connect: constructeurIds.map((id) => ({ id })),
+    };
+  }
+
+  return prisma.piece.create({
+    data,
   });
 }
 
@@ -161,7 +182,7 @@ async function createComponent(options: {
   name: string;
   reference: string;
   price: number;
-  constructeurId?: string | null;
+  constructeurIds?: string[] | null;
   typeId: string;
   fieldValues: Record<string, string>;
   structure?: Prisma.InputJsonValue;
@@ -185,22 +206,169 @@ async function createComponent(options: {
     },
   );
 
+  const constructeurIds = Array.isArray(options.constructeurIds)
+    ? Array.from(
+        new Set(
+          options.constructeurIds
+            .filter((value): value is string => typeof value === 'string')
+            .map((value) => value.trim())
+            .filter((value) => value.length > 0),
+        ),
+      )
+    : [];
+
+  const data: any = {
+    name: options.name,
+    reference: options.reference,
+    prix: new Prisma.Decimal(options.price),
+    typeComposantId: options.typeId,
+    structure:
+      options.structure === undefined
+        ? Prisma.JsonNull
+        : options.structure ?? Prisma.JsonNull,
+    customFieldValues: {
+      create: customFieldValues,
+    },
+  };
+
+  if (constructeurIds.length) {
+    data.constructeurs = {
+      connect: constructeurIds.map((id) => ({ id })),
+    };
+  }
+
   return prisma.composant.create({
+    data,
+  });
+}
+
+async function createProductType(
+  name: string,
+  code: string,
+  description: string,
+  fields: Array<{
+    name: string;
+    type: 'text' | 'number' | 'select' | 'boolean' | 'date';
+    required?: boolean;
+    options?: string[];
+  }>,
+  skeleton?: Record<string, unknown>,
+) {
+  const type = await prisma.modelType.create({
     data: {
-      name: options.name,
-      reference: options.reference,
-      prix: new Prisma.Decimal(options.price),
-      typeComposantId: options.typeId,
-      constructeurId: options.constructeurId ?? null,
-      structure:
-        options.structure === undefined
-          ? Prisma.JsonNull
-          : options.structure ?? Prisma.JsonNull,
-      customFieldValues: {
-        create: customFieldValues,
+      name,
+      code,
+      category: 'PRODUCT',
+      description,
+      productSkeleton: skeleton
+        ? (skeleton as Prisma.InputJsonValue)
+        : Prisma.JsonNull,
+      productCustomFields: {
+        create: fields.map((field, index) => ({
+          name: field.name,
+          type: field.type,
+          required: field.required ?? false,
+          options: field.options ?? [],
+          orderIndex: index,
+        })),
       },
     },
   });
+
+  const customFields = await prisma.customField.findMany({
+    where: { typeProductId: type.id },
+  });
+
+  const fieldMap: CreatedFields = {};
+  customFields.forEach((field) => {
+    fieldMap[field.name] = field.id;
+  });
+
+  return { type, fieldMap };
+}
+
+async function createProduct(options: {
+  name: string;
+  reference?: string;
+  supplierPrice?: number | null;
+  constructeurIds?: string[] | null;
+  typeId?: string | null;
+  fieldValues?: Record<string, string>;
+}) {
+  const fieldValues = options.fieldValues ?? {};
+
+  const customFields = options.typeId
+    ? await prisma.customField.findMany({
+        where: { typeProductId: options.typeId },
+      })
+    : [];
+
+  const customFieldValues = Object.entries(fieldValues).flatMap(
+    ([fieldName, value]) => {
+      if (typeof value !== 'string') {
+        return [];
+      }
+
+      const target = customFields.find((field) => field.name === fieldName);
+      if (!target) {
+        return [];
+      }
+
+      return [
+        {
+          value,
+          customFieldId: target.id,
+        },
+      ];
+    },
+  );
+
+  const constructeurIds = Array.isArray(options.constructeurIds)
+    ? Array.from(
+        new Set(
+          options.constructeurIds
+            .filter((value): value is string => typeof value === 'string')
+            .map((value) => value.trim())
+            .filter((value) => value.length > 0),
+        ),
+      )
+    : [];
+
+  const data: Prisma.ProductCreateInput = {
+    name: options.name,
+    reference: options.reference ?? null,
+    supplierPrice:
+      options.supplierPrice === undefined || options.supplierPrice === null
+        ? null
+        : new Prisma.Decimal(options.supplierPrice),
+  };
+
+  if (options.typeId) {
+    data.typeProduct = {
+      connect: { id: options.typeId },
+    };
+  }
+
+  if (constructeurIds.length) {
+    data.constructeurs = {
+      connect: constructeurIds.map((id) => ({ id })),
+    };
+  }
+
+  if (customFieldValues.length) {
+    data.customFieldValues = {
+      create: customFieldValues.map((entry) => ({
+        value: entry.value,
+        customField: {
+          connect: { id: entry.customFieldId },
+        },
+      })),
+    };
+  }
+
+  return prisma.product.create({
+    data,
+  });
 }
 
 async function main() {
@@ -335,6 +503,63 @@ async function main() {
     },
   });
 
+  console.log('Création des types de produits…');
+  const hydraulicProductFields: {
+    name: string;
+    type: 'text' | 'number' | 'select' | 'boolean' | 'date';
+    required?: boolean;
+    options?: string[];
+  }[] = [
+    { name: 'Fournisseur', type: 'text', required: true },
+    { name: 'Garantie (mois)', type: 'number', required: true },
+    {
+      name: 'Délai d’approvisionnement (jours)',
+      type: 'number',
+    },
+  ];
+
+  const hydraulicProductType = await createProductType(
+    'Produit hydraulique standard',
+    'hydraulic-product',
+    'Produits compatibles avec les centrales hydrauliques',
+    hydraulicProductFields,
+  );
+
+  console.log('Création des produits…');
+  const pumpProduct = await createProduct({
+    name: 'Pompe PX-300 Fournisseur A',
+    reference: 'PRD-PX-300-A',
+    supplierPrice: 1520,
+    typeId: hydraulicProductType.type.id,
+    fieldValues: {
+      Fournisseur: 'HydrauParts',
+      'Garantie (mois)': '24',
+      'Délai d’approvisionnement (jours)': '21',
+    },
+  });
+
+  const coolingProduct = await createProduct({
+    name: 'Module de refroidissement AC-50 - OEM',
+    reference: 'PRD-AC-50',
+    supplierPrice: 1980,
+    typeId: hydraulicProductType.type.id,
+    fieldValues: {
+      Fournisseur: 'ThermoTech',
+      'Garantie (mois)': '18',
+      'Délai d’approvisionnement (jours)': '28',
+    },
+  });
+
+  console.log('Association des produits aux pièces…');
+  await prisma.piece.update({
+    where: { id: pumpPiece.id },
+    data: {
+      product: {
+        connect: { id: pumpProduct.id },
+      },
+    },
+  });
+
   console.log('Création des types de composants…');
   const coolingComponentFields: {
     name: string;
@@ -473,6 +698,15 @@ async function main() {
     } as Prisma.InputJsonValue,
   });
 
+  await prisma.composant.update({
+    where: { id: coolingModule.id },
+    data: {
+      product: {
+        connect: { id: coolingProduct.id },
+      },
+    },
+  });
+
   const structuralFrame = await createComponent({
     name: 'Châssis structurel XC-800',
     reference: 'FRAME-XC800',

src/app.module.ts

@@ -14,6 +14,7 @@ import { ConstructeursModule } from './constructeurs/constructeurs.module';
 import { ProfilesModule } from './profiles/profiles.module';
 import { SessionModule } from './session/session.module';
 import { ModelTypeModule } from './model-type/model-type.module';
+import { ProductsModule } from './products/products.module';
 
 @Module({
   imports: [
@@ -32,6 +33,7 @@ import { ModelTypeModule } from './model-type/model-type.module';
     ProfilesModule,
     SessionModule,
     ModelTypeModule,
+    ProductsModule,
   ],
   controllers: [AppController],
   providers: [AppService],

src/common/constants/component-includes.ts

@@ -6,20 +6,34 @@ const CUSTOM_FIELD_SELECT = {
   type: true,
   required: true,
   options: true,
+  orderIndex: true,
 } as const;
 
 export const COMPONENT_WITH_RELATIONS_INCLUDE = {
   typeComposant: {
     include: {
-      customFields: true,
+      customFields: {
+        orderBy: { orderIndex: 'asc' },
+      },
     },
   },
-  constructeur: true,
+  constructeurs: true,
   customFieldValues: {
     include: {
       customField: { select: CUSTOM_FIELD_SELECT },
     },
   },
+  product: {
+    include: {
+      constructeurs: true,
+      customFieldValues: {
+        include: {
+          customField: { select: CUSTOM_FIELD_SELECT },
+        },
+      },
+      documents: true,
+    },
+  },
   machineLinks: {
     include: {
       machine: true,

src/common/constants/custom-field.constant.ts

@@ -4,4 +4,5 @@ export const CUSTOM_FIELD_SELECT = {
   type: true,
   required: true,
   options: true,
+  orderIndex: true,
 } as const;

src/common/constants/product-includes.ts

@@ -0,0 +1,32 @@
+import { Prisma } from '@prisma/client';
+
+export const PRODUCT_WITH_RELATIONS_INCLUDE = {
+  typeProduct: {
+    include: {
+      productCustomFields: {
+        orderBy: { orderIndex: 'asc' },
+      },
+    },
+  },
+  constructeurs: true,
+  documents: true,
+  customFieldValues: {
+    include: {
+      customField: true,
+    },
+  },
+  pieces: {
+    select: {
+      id: true,
+      name: true,
+      reference: true,
+    },
+  },
+  composants: {
+    select: {
+      id: true,
+      name: true,
+      reference: true,
+    },
+  },
+} satisfies Prisma.ProductInclude;

src/common/mappers/model-type.mapper.spec.ts

@@ -43,7 +43,10 @@ describe('ModelTypeMapper', () => {
       description: 'Desc',
       notes: 'Desc',
     });
-    expect(input.customFields?.create?.[0]).toMatchObject({ name: 'Field' });
+    expect(input.customFields?.create?.[0]).toMatchObject({
+      name: 'Field',
+      orderIndex: 0,
+    });
     expect((input as any).componentSkeleton).toEqual({
       pieces: [
         {

src/common/mappers/model-type.mapper.ts

@@ -12,12 +12,18 @@ import type {
 import { CUSTOM_FIELD_SELECT } from '../constants/custom-field.constant';
 
 export const COMPONENT_TYPE_INCLUDE: Prisma.ModelTypeInclude = {
-  customFields: { select: CUSTOM_FIELD_SELECT },
+  customFields: {
+    select: CUSTOM_FIELD_SELECT,
+    orderBy: { orderIndex: 'asc' },
+  },
   composants: true,
 };
 
 export const PIECE_TYPE_INCLUDE: Prisma.ModelTypeInclude = {
-  pieceCustomFields: { select: CUSTOM_FIELD_SELECT },
+  pieceCustomFields: {
+    select: CUSTOM_FIELD_SELECT,
+    orderBy: { orderIndex: 'asc' },
+  },
   pieceRequirements: true,
   pieces: true,
 };
@@ -42,11 +48,12 @@ export class ModelTypeMapper {
       notes: description ?? null,
       customFields: customFields
         ? {
-            create: customFields.map((field) => ({
+            create: customFields.map((field, index) => ({
               name: field.name,
               type: field.type,
               required: field.required ?? false,
               options: field.options,
+              orderIndex: field.orderIndex ?? index,
             })),
           }
         : undefined,
@@ -97,11 +104,12 @@ export class ModelTypeMapper {
       notes: description ?? null,
       pieceCustomFields: customFields
         ? {
-            create: customFields.map((field) => ({
+            create: customFields.map((field, index) => ({
               name: field.name,
               type: field.type,
               required: field.required ?? false,
               options: field.options,
+              orderIndex: field.orderIndex ?? index,
             })),
           }
         : undefined,
@@ -165,11 +173,12 @@ export class ModelTypeMapper {
       return [];
     }
 
-    return fields.map((field) => ({
+    return fields.map((field, index) => ({
       name: field.name,
       type: field.type,
       required: field.required ?? false,
       options: field.options,
+      orderIndex: field.orderIndex ?? index,
     }));
   }
 
@@ -180,11 +189,12 @@ export class ModelTypeMapper {
       return [];
     }
 
-    return fields.map((field) => ({
+    return fields.map((field, index) => ({
       name: field.name,
       type: field.type,
       required: field.required ?? false,
       options: field.options,
+      orderIndex: field.orderIndex ?? index,
     }));
   }
 }

src/common/mappers/type-machine.mapper.spec.ts

@@ -26,6 +26,16 @@ const baseDto = {
       typePieceId: 'piece-id',
     },
   ],
+  productRequirements: [
+    {
+      label: 'Product',
+      minCount: 1,
+      maxCount: 3,
+      required: true,
+      allowNewModels: true,
+      typeProductId: 'product-id',
+    },
+  ],
 };
 
 describe('TypeMachineMapper', () => {
@@ -33,12 +43,16 @@ describe('TypeMachineMapper', () => {
     const input = TypeMachineMapper.toCreateInput(baseDto as any);
 
     expect(input.customFields?.create).toHaveLength(1);
+    expect(input.customFields?.create?.[0]).toMatchObject({
+      orderIndex: 0,
+    });
     expect(input.componentRequirements?.create?.[0]).toMatchObject({
       label: 'Comp',
       minCount: 2,
       maxCount: 4,
       required: true,
       allowNewModels: false,
+      orderIndex: 0,
     });
     expect(input.pieceRequirements?.create?.[0]).toMatchObject({
       label: 'Piece',
@@ -46,6 +60,15 @@ describe('TypeMachineMapper', () => {
       maxCount: 2,
       required: false,
       allowNewModels: true,
+      orderIndex: 0,
+    });
+    expect(input.productRequirements?.create?.[0]).toMatchObject({
+      label: 'Product',
+      minCount: 1,
+      maxCount: 3,
+      required: true,
+      allowNewModels: true,
+      orderIndex: 0,
     });
   });
 
@@ -59,6 +82,7 @@ describe('TypeMachineMapper', () => {
         type: 'string',
         required: true,
         options: ['a'],
+        orderIndex: 0,
       },
     ]);
   });
@@ -70,16 +94,27 @@ describe('TypeMachineMapper', () => {
     const piece = TypeMachineMapper.mapPieceRequirementInputs(
       baseDto.pieceRequirements as any,
     );
+    const product = TypeMachineMapper.mapProductRequirementInputs(
+      baseDto.productRequirements as any,
+    );
 
     expect(component[0]).toMatchObject({
       typeComposantId: 'comp-id',
       minCount: 2,
       maxCount: 4,
+      orderIndex: 0,
     });
     expect(piece[0]).toMatchObject({
       typePieceId: 'piece-id',
       minCount: 0,
       maxCount: 2,
+      orderIndex: 0,
+    });
+    expect(product[0]).toMatchObject({
+      typeProductId: 'product-id',
+      minCount: 1,
+      maxCount: 3,
+      orderIndex: 0,
     });
   });
 });

src/common/mappers/type-machine.mapper.ts

@@ -13,15 +13,26 @@ type RequirementDto = {
   allowNewModels?: boolean | null;
   typeComposantId?: string;
   typePieceId?: string;
+  typeProductId?: string;
+  orderIndex?: number | null;
 };
 
 export const TYPE_MACHINE_DEFAULT_INCLUDE: Prisma.TypeMachineInclude = {
-  customFields: { select: CUSTOM_FIELD_SELECT },
+  customFields: {
+    select: CUSTOM_FIELD_SELECT,
+    orderBy: { orderIndex: 'asc' },
+  },
   componentRequirements: {
     include: { typeComposant: true },
+    orderBy: { orderIndex: 'asc' },
   },
   pieceRequirements: {
     include: { typePiece: true },
+    orderBy: { orderIndex: 'asc' },
+  },
+  productRequirements: {
+    include: { typeProduct: true },
+    orderBy: { orderIndex: 'asc' },
   },
 };
 
@@ -34,8 +45,13 @@ export class TypeMachineMapper {
   static toCreateInput(
     dto: CreateTypeMachineDto,
   ): Prisma.TypeMachineCreateInput {
-    const { customFields, componentRequirements, pieceRequirements, ...data } =
-      dto;
+    const {
+      customFields,
+      componentRequirements,
+      pieceRequirements,
+      productRequirements,
+      ...data
+    } = dto;
 
     return {
       ...data,
@@ -44,14 +60,20 @@ export class TypeMachineMapper {
         componentRequirements,
       ),
       pieceRequirements: this.mapPieceRequirements(pieceRequirements),
+      productRequirements: this.mapProductRequirements(productRequirements),
     };
   }
 
   static toUpdateData(
     dto: UpdateTypeMachineDto,
   ): Prisma.TypeMachineUpdateInput {
-    const { customFields, componentRequirements, pieceRequirements, ...data } =
-      dto;
+    const {
+      customFields,
+      componentRequirements,
+      pieceRequirements,
+      productRequirements,
+      ...data
+    } = dto;
 
     const payload: Prisma.TypeMachineUpdateInput = { ...data };
 
@@ -67,6 +89,10 @@ export class TypeMachineMapper {
       payload.pieceRequirements = undefined;
     }
 
+    if (productRequirements !== undefined) {
+      payload.productRequirements = undefined;
+    }
+
     return payload;
   }
 
@@ -78,11 +104,12 @@ export class TypeMachineMapper {
     }
 
     return {
-      create: fields.map((field) => ({
+      create: fields.map((field, index) => ({
         name: field.name,
         type: field.type,
         required: field.required ?? false,
         options: field.options,
+        orderIndex: field.orderIndex ?? index,
       })),
     };
   }
@@ -92,11 +119,12 @@ export class TypeMachineMapper {
       return [];
     }
 
-    return fields.map((field) => ({
+    return fields.map((field, index) => ({
       name: field.name,
       type: field.type,
       required: field.required ?? false,
       options: field.options,
+      orderIndex: field.orderIndex ?? index,
     }));
   }
 
@@ -110,12 +138,13 @@ export class TypeMachineMapper {
     }
 
     return {
-      create: requirements.map((requirement) => ({
+      create: requirements.map((requirement, index) => ({
         label: requirement.label ?? null,
         minCount: requirement.minCount ?? 1,
         maxCount: requirement.maxCount ?? null,
         required: requirement.required ?? true,
         allowNewModels: requirement.allowNewModels ?? true,
+        orderIndex: requirement.orderIndex ?? index,
         typeComposant: requirement.typeComposantId
           ? {
               connect: { id: requirement.typeComposantId },
@@ -134,12 +163,13 @@ export class TypeMachineMapper {
       return [];
     }
 
-    return requirements.map((requirement) => ({
+    return requirements.map((requirement, index) => ({
       label: requirement.label ?? null,
       minCount: requirement.minCount ?? 1,
       maxCount: requirement.maxCount ?? null,
       required: requirement.required ?? true,
       allowNewModels: requirement.allowNewModels ?? true,
+      orderIndex: requirement.orderIndex ?? index,
       typeComposantId: requirement.typeComposantId!,
     }));
   }
@@ -154,12 +184,13 @@ export class TypeMachineMapper {
     }
 
     return {
-      create: requirements.map((requirement) => ({
+      create: requirements.map((requirement, index) => ({
         label: requirement.label ?? null,
         minCount: requirement.minCount ?? 0,
         maxCount: requirement.maxCount ?? null,
         required: requirement.required ?? false,
         allowNewModels: requirement.allowNewModels ?? true,
+        orderIndex: requirement.orderIndex ?? index,
         typePiece: requirement.typePieceId
           ? {
               connect: { id: requirement.typePieceId },
@@ -178,13 +209,60 @@ export class TypeMachineMapper {
       return [];
     }
 
-    return requirements.map((requirement) => ({
+    return requirements.map((requirement, index) => ({
       label: requirement.label ?? null,
       minCount: requirement.minCount ?? 0,
       maxCount: requirement.maxCount ?? null,
       required: requirement.required ?? false,
       allowNewModels: requirement.allowNewModels ?? true,
+      orderIndex: requirement.orderIndex ?? index,
       typePieceId: requirement.typePieceId!,
     }));
   }
+
+  static mapProductRequirements(
+    requirements?: RequirementDto[] | null,
+  ):
+    | Prisma.TypeMachineProductRequirementCreateNestedManyWithoutTypeMachineInput
+    | undefined {
+    if (!requirements || requirements.length === 0) {
+      return undefined;
+    }
+
+    return {
+      create: requirements.map((requirement, index) => ({
+        label: requirement.label ?? null,
+        minCount: requirement.minCount ?? 0,
+        maxCount: requirement.maxCount ?? null,
+        required: requirement.required ?? false,
+        allowNewModels: requirement.allowNewModels ?? true,
+        orderIndex: requirement.orderIndex ?? index,
+        typeProduct: requirement.typeProductId
+          ? {
+              connect: { id: requirement.typeProductId },
+            }
+          : (() => {
+              throw new Error(
+                'typeProductId est requis pour créer une contrainte produit.',
+              );
+            })(),
+      })),
+    };
+  }
+
+  static mapProductRequirementInputs(requirements?: RequirementDto[] | null) {
+    if (!requirements || requirements.length === 0) {
+      return [];
+    }
+
+    return requirements.map((requirement, index) => ({
+      label: requirement.label ?? null,
+      minCount: requirement.minCount ?? 0,
+      maxCount: requirement.maxCount ?? null,
+      required: requirement.required ?? false,
+      allowNewModels: requirement.allowNewModels ?? true,
+      orderIndex: requirement.orderIndex ?? index,
+      typeProductId: requirement.typeProductId!,
+    }));
+  }
 }

src/common/repositories/model-types.repository.spec.ts

@@ -45,6 +45,7 @@ describe('ModelTypesRepository', () => {
           type: 'string',
           required: true,
           options: [],
+          orderIndex: 0,
           typeComposantId: 'comp-id',
         },
       ],
@@ -63,6 +64,7 @@ describe('ModelTypesRepository', () => {
           type: 'string',
           required: false,
           options: [],
+          orderIndex: 0,
           typePieceId: 'piece-id',
         },
       ],

src/common/repositories/type-machines.repository.spec.ts

@@ -44,6 +44,7 @@ describe('TypeMachinesRepository', () => {
           type: 'string',
           required: true,
           options: [],
+          orderIndex: 0,
           typeMachineId: 'machine-id',
         },
       ],

src/common/repositories/type-machines.repository.ts

@@ -17,6 +17,11 @@ type PieceRequirementInput = Omit<
   'id' | 'typeMachineId'
 >;
 
+type ProductRequirementInput = Omit<
+  Prisma.TypeMachineProductRequirementCreateManyInput,
+  'id' | 'typeMachineId'
+>;
+
 @Injectable()
 export class TypeMachinesRepository {
   constructor(private readonly prisma: PrismaService) {}
@@ -132,6 +137,28 @@ export class TypeMachinesRepository {
     });
   }
 
+  async deleteProductRequirements(typeMachineId: string) {
+    await this.client.typeMachineProductRequirement.deleteMany({
+      where: { typeMachineId },
+    });
+  }
+
+  async createProductRequirements(
+    typeMachineId: string,
+    requirements: ProductRequirementInput[],
+  ) {
+    if (!requirements.length) {
+      return;
+    }
+
+    await this.client.typeMachineProductRequirement.createMany({
+      data: requirements.map((requirement) => ({
+        ...requirement,
+        typeMachineId,
+      })),
+    });
+  }
+
   async findMachinesUsingType(typeMachineId: string) {
     return this.client.machine.findMany({
       where: { typeMachineId },

src/common/utils/constructeur-link.util.ts

@@ -0,0 +1,254 @@
+import { Prisma } from '@prisma/client';
+import type { PrismaService } from '../../prisma/prisma.service';
+
+type PrismaExecutor = Prisma.TransactionClient | PrismaService;
+
+type LinkOrientation = {
+  parentColumn: 'A' | 'B';
+  constructeurColumn: 'A' | 'B';
+};
+
+const DEFAULT_ORIENTATIONS: Record<string, LinkOrientation> = {
+  _MachineConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+  _ComposantConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+  _PieceConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+  _ProductConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+};
+
+const sanitizeTableName = (tableName: string): string => {
+  if (!/^_[A-Za-z0-9]+$/.test(tableName)) {
+    throw new Error(`Invalid constructeur link table name: ${tableName}`);
+  }
+  return `"${tableName}"`;
+};
+
+const ORIENTATION_CACHE = new Map<string, LinkOrientation>();
+const KNOWN_PARENT_TABLES = new Set([
+  'machines',
+  'composants',
+  'pieces',
+  'products',
+]);
+const oppositeColumn = (column: 'A' | 'B'): 'A' | 'B' =>
+  column === 'A' ? 'B' : 'A';
+
+async function resolveOrientation(
+  prisma: PrismaExecutor & {
+    __getConstructeurLinkOrientation?: (
+      table: string,
+    ) => LinkOrientation | Promise<LinkOrientation>;
+  },
+  tableName: string,
+): Promise<LinkOrientation> {
+  const cached = ORIENTATION_CACHE.get(tableName);
+  if (cached) {
+    return cached;
+  }
+
+  if (typeof prisma.__getConstructeurLinkOrientation === 'function') {
+    const orientation =
+      await prisma.__getConstructeurLinkOrientation(tableName);
+    ORIENTATION_CACHE.set(tableName, orientation);
+    return orientation;
+  }
+
+  const rows = await prisma.$queryRaw<
+    Array<{ column_name: string; foreign_table_name: string }>
+  >(Prisma.sql`
+    SELECT
+      kcu.column_name,
+      ccu.table_name AS foreign_table_name
+    FROM information_schema.table_constraints tc
+    JOIN information_schema.key_column_usage kcu
+      ON tc.constraint_name = kcu.constraint_name
+      AND tc.table_schema = kcu.table_schema
+    JOIN information_schema.constraint_column_usage ccu
+      ON tc.constraint_name = ccu.constraint_name
+      AND tc.table_schema = ccu.table_schema
+    WHERE tc.constraint_type = 'FOREIGN KEY'
+      AND tc.table_schema = 'public'
+      AND tc.table_name = ${tableName}
+  `);
+
+  let parentColumn: 'A' | 'B' | null = null;
+  let constructeurColumn: 'A' | 'B' | null = null;
+
+  for (const row of rows) {
+    const column = row.column_name?.toUpperCase?.() as 'A' | 'B' | undefined;
+    if (column !== 'A' && column !== 'B') {
+      continue;
+    }
+
+    if (row.foreign_table_name === 'constructeurs') {
+      constructeurColumn = column;
+      continue;
+    }
+
+    if (KNOWN_PARENT_TABLES.has(row.foreign_table_name)) {
+      parentColumn = column;
+      continue;
+    }
+
+    if (!parentColumn) {
+      parentColumn = column;
+    }
+  }
+
+  if (parentColumn && !constructeurColumn) {
+    constructeurColumn = oppositeColumn(parentColumn);
+  } else if (!parentColumn && constructeurColumn) {
+    parentColumn = oppositeColumn(constructeurColumn);
+  }
+
+  if (!parentColumn || !constructeurColumn) {
+    const fallback = DEFAULT_ORIENTATIONS[tableName];
+    if (fallback) {
+      parentColumn ??= fallback.parentColumn;
+      constructeurColumn ??= fallback.constructeurColumn;
+    }
+  }
+
+  if (!parentColumn || !constructeurColumn) {
+    const columns = rows
+      .map((row) => row.column_name?.toUpperCase?.() as 'A' | 'B' | undefined)
+      .filter(
+        (column): column is 'A' | 'B' => column === 'A' || column === 'B',
+      );
+
+    if (columns.length === 2) {
+      if (!parentColumn) {
+        parentColumn = columns[0];
+      }
+      if (!constructeurColumn) {
+        const alternative = columns.find((column) => column !== parentColumn);
+        if (alternative) {
+          constructeurColumn = alternative;
+        }
+      }
+    }
+  }
+
+  if (!parentColumn || !constructeurColumn) {
+    throw new Error(
+      `Impossible de déterminer l'orientation de la table ${tableName}.`,
+    );
+  }
+
+  const orientation: LinkOrientation = {
+    parentColumn,
+    constructeurColumn,
+  };
+  ORIENTATION_CACHE.set(tableName, orientation);
+  return orientation;
+}
+
+export async function syncConstructeurLinks(
+  prisma: PrismaExecutor,
+  tableName: string,
+  parentId: string,
+  constructeurIds: string[],
+): Promise<string[]> {
+  const executor = prisma as PrismaExecutor & {
+    __syncConstructeurLinks?: (
+      table: string,
+      parent: string,
+      ids: string[],
+    ) => Promise<void> | void;
+    __getConstructeurLinkOrientation?: (
+      table: string,
+    ) => LinkOrientation | Promise<LinkOrientation>;
+  };
+
+  const table = Prisma.raw(sanitizeTableName(tableName));
+  const uniqueConstructeurIds = Array.from(
+    new Set(
+      constructeurIds
+        .map((value) => (typeof value === 'string' ? value.trim() : ''))
+        .filter((value) => value.length > 0),
+    ),
+  );
+  let targetConstructeurIds = uniqueConstructeurIds;
+
+  const constructeurDelegate = (executor as any)?.constructeur as
+    | {
+        findMany?: (args: {
+          where: { id: { in: string[] } };
+          select: { id: boolean };
+        }) => Promise<Array<{ id: string }>>;
+      }
+    | undefined;
+
+  if (targetConstructeurIds.length > 0 && constructeurDelegate?.findMany) {
+    const existing = await constructeurDelegate.findMany({
+      where: { id: { in: targetConstructeurIds } },
+      select: { id: true },
+    });
+    const existingIds = new Set(existing.map(({ id }) => id));
+    targetConstructeurIds = targetConstructeurIds.filter((id) =>
+      existingIds.has(id),
+    );
+  }
+
+  const orientation = await resolveOrientation(executor, tableName);
+
+  if (typeof executor.__syncConstructeurLinks === 'function') {
+    await executor.__syncConstructeurLinks(
+      tableName,
+      parentId,
+      targetConstructeurIds,
+    );
+    return targetConstructeurIds;
+  }
+
+  await prisma.$executeRaw(
+    Prisma.sql`DELETE FROM ${table} WHERE ${Prisma.raw(
+      `"${orientation.parentColumn}"`,
+    )} = ${parentId}`,
+  );
+
+  if (targetConstructeurIds.length === 0) {
+    return [];
+  }
+
+  const valueTuples = targetConstructeurIds.map(
+    (constructeurId) => Prisma.sql`(${parentId}, ${constructeurId})`,
+  );
+
+  await prisma.$executeRaw(
+    Prisma.sql`
+      INSERT INTO ${table} (
+        ${Prisma.raw(`"${orientation.parentColumn}"`)},
+        ${Prisma.raw(`"${orientation.constructeurColumn}"`)}
+      )
+      VALUES ${Prisma.join(valueTuples)}
+      ON CONFLICT DO NOTHING
+    `,
+  );
+  return fetchConstructeurIds(executor, tableName, parentId, orientation);
+}
+
+export async function fetchConstructeurIds(
+  prisma: PrismaExecutor,
+  tableName: string,
+  parentId: string,
+  orientationOverride?: LinkOrientation,
+): Promise<string[]> {
+  const orientation =
+    orientationOverride ?? (await resolveOrientation(prisma as any, tableName));
+  const table = Prisma.raw(sanitizeTableName(tableName));
+  const rows = await prisma.$queryRaw<Array<{ constructeurId: string | null }>>(
+    Prisma.sql`
+      SELECT ${Prisma.raw(
+        `"${orientation.constructeurColumn}"`,
+      )} AS "constructeurId"
+      FROM ${table}
+      WHERE ${Prisma.raw(`"${orientation.parentColumn}"`)} = ${parentId}
+    `,
+  );
+
+  return rows
+    .map((row) =>
+      typeof row.constructeurId === 'string' ? row.constructeurId : null,
+    )
+    .filter((id): id is string => Boolean(id));
+}

src/component-models/structure.normalizer.ts

@@ -76,6 +76,59 @@ export function normalizeComponentModelStructure(
     },
   );
 
+  const products = toArray((structure as any)?.products).map((product) => {
+    const candidate = product as Record<string, unknown> | null | undefined;
+
+    if (candidate?.typeProductId) {
+      const normalized: ComponentModelStructure['products'][number] = {
+        typeProductId:
+          ensureString(candidate.typeProductId).trim() || 'UNKNOWN',
+        role: sanitizeRole(candidate.role),
+      };
+
+      if (candidate?.familyCode) {
+        const familyCode = ensureString(candidate.familyCode).trim();
+        if (familyCode) {
+          (normalized as Record<string, unknown>).familyCode = familyCode;
+        }
+      }
+
+      if (candidate?.typeProductLabel) {
+        const label = ensureString(candidate.typeProductLabel).trim();
+        if (label) {
+          (normalized as Record<string, unknown>).typeProductLabel = label;
+        }
+      }
+
+      if (candidate?.reference) {
+        const reference = ensureString(candidate.reference).trim();
+        if (reference) {
+          (normalized as Record<string, unknown>).reference = reference;
+        }
+      }
+
+      return normalized;
+    }
+
+    if (candidate?.familyCode) {
+      return {
+        familyCode: ensureString(candidate.familyCode).trim() || 'UNKNOWN',
+        role: sanitizeRole(candidate.role),
+      } as ComponentModelStructure['products'][number];
+    }
+
+    return {
+      familyCode:
+        ensureString(
+          candidate?.familyCode ??
+            candidate?.name ??
+            candidate?.typeProductLabel ??
+            'UNKNOWN',
+        ).trim() || 'UNKNOWN',
+      role: sanitizeRole(candidate?.role),
+    } as ComponentModelStructure['products'][number];
+  });
+
   const rawSubcomponents = toArray(
     (structure as any)?.subcomponents ?? (structure as any)?.subComponents,
   );
@@ -115,6 +168,7 @@ export function normalizeComponentModelStructure(
 
   return {
     pieces,
+    products,
     customFields,
     subcomponents,
   };

src/composants/composants.service.spec.ts

@@ -1,7 +1,10 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { ComposantsService } from './composants.service';
 import { PrismaService } from '../prisma/prisma.service';
-import { CreateComposantDto, UpdateComposantDto } from '../shared/dto/composant.dto';
+import {
+  CreateComposantDto,
+  UpdateComposantDto,
+} from '../shared/dto/composant.dto';
 
 describe('ComposantsService', () => {
   let service: ComposantsService;
@@ -32,6 +35,7 @@ describe('ComposantsService', () => {
     const dto: CreateComposantDto = {
       name: 'Comp A',
       typeComposantId: 'type-1',
+      productId: ' product-1 ',
     };
 
     prisma.composant.create.mockResolvedValue({ id: 'comp-1', name: dto.name });
@@ -39,16 +43,25 @@ describe('ComposantsService', () => {
     const result = await service.create(dto);
 
     expect(prisma.composant.create).toHaveBeenCalled();
+    expect(prisma.composant.create.mock.calls[0][0].data.product).toEqual({
+      connect: { id: 'product-1' },
+    });
     expect(result).toMatchObject({ id: 'comp-1' });
   });
 
   it('updates a component', async () => {
-    const dto: UpdateComposantDto = { name: 'Updated' };
+    const dto: UpdateComposantDto = { name: 'Updated', productId: '' };
 
-    prisma.composant.update.mockResolvedValue({ id: 'comp-1', name: 'Updated' });
+    prisma.composant.update.mockResolvedValue({
+      id: 'comp-1',
+      name: 'Updated',
+    });
 
     await service.update('comp-1', dto);
 
     expect(prisma.composant.update).toHaveBeenCalled();
+    expect(prisma.composant.update.mock.calls[0][0].data.product).toEqual({
+      disconnect: true,
+    });
   });
 });

src/composants/composants.service.ts

@@ -1,4 +1,4 @@
-import { Injectable } from '@nestjs/common';
+import { ConflictException, Injectable } from '@nestjs/common';
 import { Prisma } from '@prisma/client';
 import { PrismaService } from '../prisma/prisma.service';
 import {
@@ -9,14 +9,18 @@ import {
   COMPONENT_WITH_RELATIONS_INCLUDE,
   ComposantWithRelations,
 } from '../common/constants/component-includes';
+import { syncConstructeurLinks } from '../common/utils/constructeur-link.util';
 
 @Injectable()
 export class ComposantsService {
   constructor(private prisma: PrismaService) {}
 
-  private buildCreateInput(
+  private async buildCreateInput(
     createComposantDto: CreateComposantDto,
-  ): Prisma.ComposantCreateInput {
+  ): Promise<{
+    data: Prisma.ComposantCreateInput;
+    constructeurIds: string[];
+  }> {
     const data: Prisma.ComposantCreateInput = {
       name: createComposantDto.name,
       reference: createComposantDto.reference ?? null,
@@ -24,11 +28,11 @@ export class ComposantsService {
         createComposantDto.prix !== undefined ? createComposantDto.prix : null,
     };
 
-    if (createComposantDto.constructeurId) {
-      data.constructeur = {
-        connect: { id: createComposantDto.constructeurId },
-      };
-    }
+    const constructeurIds = this.normalizeConstructeurIds(
+      createComposantDto.constructeurIds,
+    );
+    const resolvedConstructeurIds =
+      await this.resolveExistingConstructeurIds(constructeurIds);
 
     if (createComposantDto.typeComposantId) {
       data.typeComposant = {
@@ -36,20 +40,58 @@ export class ComposantsService {
       };
     }
 
+    if (createComposantDto.productId) {
+      const normalizedProductId = createComposantDto.productId.trim();
+      if (normalizedProductId) {
+        data.product = {
+          connect: { id: normalizedProductId },
+        };
+      }
+    }
+
     if (createComposantDto.structure !== undefined) {
       data.structure = createComposantDto.structure as Prisma.InputJsonValue;
     }
 
-    return data;
+    return { data, constructeurIds: resolvedConstructeurIds };
   }
 
   async create(createComposantDto: CreateComposantDto) {
-    const created = await this.prisma.composant.create({
-      data: this.buildCreateInput(createComposantDto),
-      include: COMPONENT_WITH_RELATIONS_INCLUDE,
-    });
+    try {
+      const { data, constructeurIds } =
+        await this.buildCreateInput(createComposantDto);
+      const created = await this.prisma.composant.create({
+        data,
+        include: COMPONENT_WITH_RELATIONS_INCLUDE,
+      });
 
-    return created as ComposantWithRelations;
+      let syncedConstructeurIds: string[] = [];
+      if (constructeurIds.length > 0) {
+        syncedConstructeurIds = await syncConstructeurLinks(
+          this.prisma,
+          '_ComposantConstructeurs',
+          created.id,
+          constructeurIds,
+        );
+      }
+
+      const refreshed = (await this.prisma.composant.findUnique({
+        where: { id: created.id },
+        include: COMPONENT_WITH_RELATIONS_INCLUDE,
+      })) as ComposantWithRelations | null;
+
+      if (refreshed && syncedConstructeurIds.length > 0) {
+        (
+          refreshed as ComposantWithRelations & {
+            constructeurIds?: string[];
+          }
+        ).constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return refreshed;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
   }
 
   async findAll() {
@@ -81,10 +123,13 @@ export class ComposantsService {
       data.prix = updateComposantDto.prix;
     }
 
-    if (updateComposantDto.constructeurId !== undefined) {
-      data.constructeur = updateComposantDto.constructeurId
-        ? { connect: { id: updateComposantDto.constructeurId } }
-        : { disconnect: true };
+    let resolvedConstructeurIds: string[] | undefined;
+    if (updateComposantDto.constructeurIds !== undefined) {
+      const constructeurIds = this.normalizeConstructeurIds(
+        updateComposantDto.constructeurIds,
+      );
+      resolvedConstructeurIds =
+        await this.resolveExistingConstructeurIds(constructeurIds);
     }
 
     if (updateComposantDto.typeComposantId !== undefined) {
@@ -93,20 +138,156 @@ export class ComposantsService {
         : { disconnect: true };
     }
 
+    if (updateComposantDto.productId !== undefined) {
+      const normalizedProductId =
+        typeof updateComposantDto.productId === 'string'
+          ? updateComposantDto.productId.trim()
+          : null;
+      data.product = normalizedProductId
+        ? { connect: { id: normalizedProductId } }
+        : { disconnect: true };
+    }
+
     if (updateComposantDto.structure !== undefined) {
       data.structure = updateComposantDto.structure as Prisma.InputJsonValue;
     }
 
-    return (await this.prisma.composant.update({
-      where: { id },
-      data,
-      include: COMPONENT_WITH_RELATIONS_INCLUDE,
-    })) as ComposantWithRelations;
+    let syncedConstructeurIds: string[] | undefined;
+    try {
+      await this.prisma.$transaction(async (tx) => {
+        await tx.composant.update({
+          where: { id },
+          data,
+        });
+
+        if (resolvedConstructeurIds !== undefined) {
+          syncedConstructeurIds = await syncConstructeurLinks(
+            tx,
+            '_ComposantConstructeurs',
+            id,
+            resolvedConstructeurIds,
+          );
+        }
+      });
+
+      const refreshed = (await this.prisma.composant.findUnique({
+        where: { id },
+        include: COMPONENT_WITH_RELATIONS_INCLUDE,
+      })) as ComposantWithRelations | null;
+
+      if (refreshed && syncedConstructeurIds) {
+        (
+          refreshed as ComposantWithRelations & {
+            constructeurIds?: string[];
+          }
+        ).constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return refreshed;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
   }
 
   async remove(id: string) {
+    const [machineLinksCount, documentsCount, customFieldValuesCount] =
+      await Promise.all([
+        this.prisma.machineComponentLink.count({
+          where: { composantId: id },
+        }),
+        this.prisma.document.count({
+          where: { composantId: id },
+        }),
+        this.prisma.customFieldValue.count({
+          where: { composantId: id },
+        }),
+      ]);
+
+    const blockingReasons: string[] = [];
+
+    if (machineLinksCount > 0) {
+      blockingReasons.push(
+        `${machineLinksCount} liaison${machineLinksCount > 1 ? 's' : ''} machine`,
+      );
+    }
+    if (documentsCount > 0) {
+      blockingReasons.push(
+        `${documentsCount} document${documentsCount > 1 ? 's' : ''}`,
+      );
+    }
+
+    if (blockingReasons.length > 0) {
+      const messageParts = [
+        `Impossible de supprimer ce composant car il possède encore: ${blockingReasons.join(
+          ', ',
+        )}.`,
+      ];
+
+      if (customFieldValuesCount > 0) {
+        messageParts.push(
+          `Les ${customFieldValuesCount} valeur${
+            customFieldValuesCount > 1 ? 's' : ''
+          } de champ personnalisé seront supprimées automatiquement une fois ces éléments détachés.`,
+        );
+      }
+
+      throw new ConflictException(
+        `${messageParts.join(' ')} Supprimez ou détachez les éléments indiqués avant de réessayer.`,
+      );
+    }
+
+    if (customFieldValuesCount > 0) {
+      await this.prisma.customFieldValue.deleteMany({
+        where: { composantId: id },
+      });
+    }
+
     return this.prisma.composant.delete({
       where: { id },
     });
   }
+
+  private normalizeConstructeurIds(ids?: string[] | null): string[] {
+    if (!Array.isArray(ids)) {
+      return [];
+    }
+    const cleaned = ids
+      .map((item) => (typeof item === 'string' ? item.trim() : ''))
+      .filter((item) => item.length > 0);
+    return Array.from(new Set(cleaned));
+  }
+
+  private handlePrismaError(error: unknown): never {
+    if (error instanceof Prisma.PrismaClientKnownRequestError) {
+      if (error.code === 'P2002' && this.isNameConstraint(error)) {
+        throw new ConflictException('Un composant avec ce nom existe déjà.');
+      }
+    }
+
+    throw error;
+  }
+
+  private isNameConstraint(error: Prisma.PrismaClientKnownRequestError) {
+    const { target } = error.meta ?? {};
+    if (Array.isArray(target)) {
+      return target.includes('name');
+    }
+    if (typeof target === 'string') {
+      return target === 'name';
+    }
+    return false;
+  }
+  private async resolveExistingConstructeurIds(
+    ids: string[],
+  ): Promise<string[]> {
+    if (!ids.length) {
+      return [];
+    }
+    const existing = await this.prisma.constructeur.findMany({
+      where: { id: { in: ids } },
+      select: { id: true },
+    });
+    const existingIds = new Set(existing.map(({ id }) => id));
+    return ids.filter((id) => existingIds.has(id));
+  }
 }

src/custom-fields/custom-fields.service.ts

@@ -36,6 +36,8 @@ export class CustomFieldsService {
         return 'composantId' as const;
       case CustomFieldEntityType.PIECE:
         return 'pieceId' as const;
+      case CustomFieldEntityType.PRODUCT:
+        return 'productId' as const;
       default:
         throw new BadRequestException(
           "Type d'entité de champ personnalisé invalide.",
@@ -114,6 +116,28 @@ export class CustomFieldsService {
           valueKey: 'pieceId' as const,
         };
       }
+      case CustomFieldEntityType.PRODUCT: {
+        const product = await this.prisma.product.findUnique({
+          where: { id: entityId },
+          select: { typeProductId: true },
+        });
+
+        if (!product) {
+          throw new NotFoundException('Produit introuvable.');
+        }
+
+        if (!product.typeProductId) {
+          throw new BadRequestException(
+            'Le produit ne possède pas de type associé pour les champs personnalisés.',
+          );
+        }
+
+        return {
+          typeId: product.typeProductId,
+          customFieldTypeField: 'typeProductId' as const,
+          valueKey: 'productId' as const,
+        };
+      }
       default:
         throw new BadRequestException(
           "Type d'entité de champ personnalisé invalide.",
@@ -209,12 +233,20 @@ export class CustomFieldsService {
       if (existingField) {
         targetCustomFieldId = existingField.id;
       } else {
+        const normalizedType = (customFieldType || 'text').trim() || 'text';
+        const normalizedRequired = !!customFieldRequired;
+        const orderScope = { [customFieldTypeField]: typeId } as const;
+        const nextOrderIndex = await this.prisma.customField.count({
+          where: orderScope,
+        });
+
         const createdField = await this.prisma.customField.create({
           data: {
             name: normalizedName,
-            type: (customFieldType || 'text').trim() || 'text',
-            required: !!customFieldRequired,
+            type: normalizedType,
+            required: normalizedRequired,
             options: normalizedOptions,
+            orderIndex: nextOrderIndex,
             [customFieldTypeField]: typeId,
           },
         });

src/documents/documents.controller.ts

@@ -42,6 +42,11 @@ export class DocumentsController {
     return this.documentsService.findByPiece(pieceId);
   }
 
+  @Get('product/:productId')
+  findByProduct(@Param('productId') productId: string) {
+    return this.documentsService.findByProduct(productId);
+  }
+
   @Get('site/:siteId')
   findBySite(@Param('siteId') siteId: string) {
     return this.documentsService.findBySite(siteId);

src/documents/documents.service.ts

@@ -16,6 +16,7 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
         site: true,
       },
     });
@@ -27,6 +28,7 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
         site: true,
       },
     });
@@ -39,6 +41,7 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
         site: true,
       },
     });
@@ -51,6 +54,7 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
         site: true,
       },
     });
@@ -63,6 +67,20 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
+        site: true,
+      },
+    });
+  }
+
+  async findByProduct(productId: string) {
+    return this.prisma.document.findMany({
+      where: { productId },
+      include: {
+        machine: true,
+        composant: true,
+        piece: true,
+        product: true,
         site: true,
       },
     });
@@ -75,6 +93,7 @@ export class DocumentsService {
         machine: true,
         composant: true,
         piece: true,
+        product: true,
         site: true,
       },
     });

src/machines/machines.service.spec.ts

@@ -59,11 +59,10 @@ describe('MachinesService', () => {
         prix: null,
         createdAt: timestamp,
         updatedAt: timestamp,
-        constructeurId: null,
+        constructeurs: [],
         typePieceId: null,
         documents: [],
         customFieldValues: [],
-        constructeur: null,
         typePiece: null,
       },
       typeMachinePieceRequirement: null,
@@ -81,7 +80,7 @@ describe('MachinesService', () => {
         id: 'piece-root',
         name: 'Root piece',
       },
-    } as any;
+    };
 
     const componentChildLink = {
       id: 'component-child',
@@ -101,11 +100,10 @@ describe('MachinesService', () => {
         prix: null,
         createdAt: timestamp,
         updatedAt: timestamp,
-        constructeurId: null,
+        constructeurs: [],
         typeComposantId: null,
         documents: [],
         customFieldValues: [],
-        constructeur: null,
         typeComposant: null,
       },
       typeMachineComponentRequirement: null,
@@ -125,7 +123,7 @@ describe('MachinesService', () => {
         name: 'Root component',
       },
       pieceLinks: [componentPieceLink],
-    } as any;
+    };
 
     return {
       id: 'machine-1',
@@ -135,11 +133,10 @@ describe('MachinesService', () => {
       createdAt: timestamp,
       updatedAt: timestamp,
       typeMachineId: null,
-      constructeurId: null,
+      constructeurs: [],
       siteId: 'site-1',
       site: null,
       typeMachine: null,
-      constructeur: null,
       componentLinks: [componentRootLink, componentChildLink],
       pieceLinks: [rootPieceLink, componentPieceLink],
       customFieldValues: [],
@@ -165,9 +162,7 @@ describe('MachinesService', () => {
     expect(rootLink.pieceLinks[0].parent?.overrides.name).toBe(
       'Root component override',
     );
-    expect(rootLink.pieceLinks[0].originalPiece.name).toBe(
-      'Piece component',
-    );
+    expect(rootLink.pieceLinks[0].originalPiece.name).toBe('Piece component');
     expect(rootLink.pieceLinks[0].piece.name).toBe('Component piece name');
     expect(rootLink.pieceLinks[0].overrides.reference).toBe('CP-001');
     expect(rootLink.overrides.name).toBe('Root component override');
@@ -193,9 +188,7 @@ describe('MachinesService', () => {
     const root = result?.componentLinks[0];
     expect(root?.childLinks[0].parent?.id).toBe('component-root');
     expect(root?.childLinks[0].parent?.composantId).toBe('component-root');
-    expect(root?.childLinks[0].originalComposant.name).toBe(
-      'Child component',
-    );
+    expect(root?.childLinks[0].originalComposant.name).toBe('Child component');
     expect(root?.childLinks[0].composant.name).toBe('Child component');
     expect(root?.pieceLinks[0].parent?.id).toBe('component-root');
     expect(root?.pieceLinks[0].parent?.composantId).toBe('component-root');
@@ -209,4 +202,52 @@ describe('MachinesService', () => {
     expect(result?.pieceLinks[0].piece.name).toBe('Root piece name');
     expect(result?.pieceLinks[0].overrides.reference).toBe('RP-001');
   });
+
+  describe('validateProductRequirements', () => {
+    const buildRequirement = (overrides: Partial<any> = {}) =>
+      ({
+        id: 'req-1',
+        label: 'Hydraulic kits',
+        minCount: 1,
+        maxCount: 2,
+        required: true,
+        allowNewModels: true,
+        typeProductId: 'product-type-1',
+        typeProduct: { name: 'Hydraulic kit' },
+        ...overrides,
+      }) as any;
+
+    const callValidate = (
+      requirement: any,
+      componentUsage: Record<string, number>,
+      pieceUsage: Record<string, number>,
+    ) => {
+      const map = new Map([[requirement.id, requirement]]);
+      const componentMap = new Map(Object.entries(componentUsage));
+      const pieceMap = new Map(Object.entries(pieceUsage));
+      (service as any).validateProductRequirements(map, componentMap, pieceMap);
+    };
+
+    it('does nothing when usage satisfies min and max constraints', () => {
+      expect(() =>
+        callValidate(buildRequirement(), { 'product-type-1': 1 }, {}),
+      ).not.toThrow();
+    });
+
+    it('throws when minimum requirement is not met', () => {
+      expect(() => callValidate(buildRequirement(), {}, {})).toThrow(
+        /requiert au moins 1 sélection/i,
+      );
+    });
+
+    it('throws when usage exceeds maximum', () => {
+      expect(() =>
+        callValidate(
+          buildRequirement({ maxCount: 2 }),
+          { 'product-type-1': 2 },
+          { 'product-type-1': 1 },
+        ),
+      ).toThrow(/ne peut pas dépasser 2 sélection/i);
+    });
+  });
 });

src/model-type/dto/create-model-type.dto.ts

@@ -3,6 +3,7 @@ import { IsEnum, IsOptional, IsString, Length, Matches } from 'class-validator';
 export enum ModelCategory {
   COMPONENT = 'COMPONENT',
   PIECE = 'PIECE',
+  PRODUCT = 'PRODUCT',
 }
 
 export class CreateModelTypeDto {

src/model-type/model-type.service.ts

@@ -11,6 +11,7 @@ import { UpdateModelTypeDto } from './dto/update-model-type.dto';
 import {
   ComponentModelStructureSchema,
   PieceModelStructureSchema,
+  ProductModelStructureSchema,
 } from '../shared/schemas/inventory';
 
 type SortField = 'name' | 'code' | 'createdAt';
@@ -112,12 +113,22 @@ export class ModelTypeService {
       if (normalizedStructure !== undefined) {
         const skeletonValue =
           normalizedStructure === null ? Prisma.JsonNull : normalizedStructure;
-        if (rest.category === ModelCategory.COMPONENT) {
-          data.componentSkeleton = skeletonValue;
-          data.pieceSkeleton = Prisma.JsonNull;
-        } else {
-          data.pieceSkeleton = skeletonValue;
-          data.componentSkeleton = Prisma.JsonNull;
+        switch (rest.category) {
+          case ModelCategory.COMPONENT:
+            data.componentSkeleton = skeletonValue;
+            data.pieceSkeleton = Prisma.JsonNull;
+            data.productSkeleton = Prisma.JsonNull;
+            break;
+          case ModelCategory.PIECE:
+            data.pieceSkeleton = skeletonValue;
+            data.componentSkeleton = Prisma.JsonNull;
+            data.productSkeleton = Prisma.JsonNull;
+            break;
+          case ModelCategory.PRODUCT:
+            data.productSkeleton = skeletonValue;
+            data.componentSkeleton = Prisma.JsonNull;
+            data.pieceSkeleton = Prisma.JsonNull;
+            break;
         }
       }
 
@@ -172,12 +183,22 @@ export class ModelTypeService {
       if (normalizedStructure !== undefined) {
         const skeletonValue =
           normalizedStructure === null ? Prisma.JsonNull : normalizedStructure;
-        if (targetCategory === ModelCategory.COMPONENT) {
-          data.componentSkeleton = skeletonValue;
-          data.pieceSkeleton = Prisma.JsonNull;
-        } else {
-          data.pieceSkeleton = skeletonValue;
-          data.componentSkeleton = Prisma.JsonNull;
+        switch (targetCategory) {
+          case ModelCategory.COMPONENT:
+            data.componentSkeleton = skeletonValue;
+            data.pieceSkeleton = Prisma.JsonNull;
+            data.productSkeleton = Prisma.JsonNull;
+            break;
+          case ModelCategory.PIECE:
+            data.pieceSkeleton = skeletonValue;
+            data.componentSkeleton = Prisma.JsonNull;
+            data.productSkeleton = Prisma.JsonNull;
+            break;
+          case ModelCategory.PRODUCT:
+            data.productSkeleton = skeletonValue;
+            data.componentSkeleton = Prisma.JsonNull;
+            data.pieceSkeleton = Prisma.JsonNull;
+            break;
         }
       }
 
@@ -212,8 +233,14 @@ export class ModelTypeService {
 
   private handlePrismaError(error: unknown): never {
     if (error instanceof Prisma.PrismaClientKnownRequestError) {
-      if (error.code === 'P2002' && this.isUniqueCodeConstraint(error)) {
-        throw new ConflictException('Ce code est déjà utilisé.');
+      if (error.code === 'P2002') {
+        if (this.isUniqueCodeConstraint(error)) {
+          throw new ConflictException('Ce code est déjà utilisé.');
+        }
+
+        if (this.isUniqueNameConstraint(error)) {
+          throw new ConflictException('Une catégorie avec ce nom existe déjà.');
+        }
       }
 
       if (error.code === 'P2025') {
@@ -235,6 +262,17 @@ export class ModelTypeService {
     return false;
   }
 
+  private isUniqueNameConstraint(error: Prisma.PrismaClientKnownRequestError) {
+    const { target } = error.meta ?? {};
+    if (Array.isArray(target)) {
+      return target.includes('name') && target.includes('category');
+    }
+    if (typeof target === 'string') {
+      return target.includes('name') && target.includes('category');
+    }
+    return false;
+  }
+
   private normalizeStructure(
     category: ModelCategory,
     structure: unknown,
@@ -253,7 +291,12 @@ export class ModelTypeService {
           structure,
         ) as Prisma.InputJsonValue;
       }
-      return PieceModelStructureSchema.parse(
+      if (category === ModelCategory.PIECE) {
+        return PieceModelStructureSchema.parse(
+          structure,
+        ) as Prisma.InputJsonValue;
+      }
+      return ProductModelStructureSchema.parse(
         structure,
       ) as Prisma.InputJsonValue;
     } catch (error) {
@@ -264,10 +307,24 @@ export class ModelTypeService {
   }
 
   private mapModelType(modelType: PrismaModelType) {
-    const structure =
-      modelType.category === ModelCategory.COMPONENT
-        ? (modelType.componentSkeleton ?? null)
-        : (modelType.pieceSkeleton ?? null);
+    let structure: Prisma.InputJsonValue | null;
+    switch (modelType.category as ModelCategory) {
+      case ModelCategory.COMPONENT:
+        structure = (modelType.componentSkeleton ??
+          null) as Prisma.InputJsonValue | null;
+        break;
+      case ModelCategory.PIECE:
+        structure = (modelType.pieceSkeleton ??
+          null) as Prisma.InputJsonValue | null;
+        break;
+      case ModelCategory.PRODUCT:
+        structure = (modelType.productSkeleton ??
+          null) as Prisma.InputJsonValue | null;
+        break;
+      default:
+        structure = null;
+        break;
+    }
 
     return {
       ...modelType,

src/pieces/pieces.service.spec.ts

@@ -19,6 +19,7 @@ describe('PiecesService', () => {
       customField: {
         findMany: jest.fn(),
         create: jest.fn(),
+        update: jest.fn(),
       },
       customFieldValue: {
         findMany: jest.fn(),
@@ -27,10 +28,7 @@ describe('PiecesService', () => {
     };
 
     const module: TestingModule = await Test.createTestingModule({
-      providers: [
-        PiecesService,
-        { provide: PrismaService, useValue: prisma },
-      ],
+      providers: [PiecesService, { provide: PrismaService, useValue: prisma }],
     }).compile();
 
     service = module.get<PiecesService>(PiecesService);
@@ -40,29 +38,45 @@ describe('PiecesService', () => {
     const dto: CreatePieceDto = {
       name: 'Piece A',
       typePieceId: 'type-piece-1',
+      productId: ' product-1 ',
     };
 
     prisma.piece.create.mockResolvedValue({ id: 'piece-1', name: dto.name });
-    prisma.piece.findUnique.mockResolvedValue({ id: 'piece-1', name: dto.name });
+    prisma.piece.findUnique.mockResolvedValue({
+      id: 'piece-1',
+      name: dto.name,
+    });
     prisma.customField.findMany.mockResolvedValue([]);
     prisma.customFieldValue.findMany.mockResolvedValue([]);
 
     const result = await service.create(dto);
 
     expect(prisma.piece.create).toHaveBeenCalled();
+    expect(prisma.piece.create.mock.calls[0][0].data.product).toEqual({
+      connect: { id: 'product-1' },
+    });
     expect(result).toMatchObject({ id: 'piece-1' });
   });
 
   it('updates a piece', async () => {
-    const dto: UpdatePieceDto = { name: 'Updated piece' };
+    const dto: UpdatePieceDto = { name: 'Updated piece', productId: '' };
 
-    prisma.piece.update.mockResolvedValue({ id: 'piece-1', name: 'Updated piece' });
-    prisma.piece.findUnique.mockResolvedValue({ id: 'piece-1', name: 'Updated piece' });
+    prisma.piece.update.mockResolvedValue({
+      id: 'piece-1',
+      name: 'Updated piece',
+    });
+    prisma.piece.findUnique.mockResolvedValue({
+      id: 'piece-1',
+      name: 'Updated piece',
+    });
     prisma.customField.findMany.mockResolvedValue([]);
     prisma.customFieldValue.findMany.mockResolvedValue([]);
 
     await service.update('piece-1', dto);
 
     expect(prisma.piece.update).toHaveBeenCalled();
+    expect(prisma.piece.update.mock.calls[0][0].data.product).toEqual({
+      disconnect: true,
+    });
   });
 });

src/pieces/pieces.service.ts

@@ -1,6 +1,7 @@
-import { Injectable } from '@nestjs/common';
+import { ConflictException, Injectable } from '@nestjs/common';
 import { Prisma } from '@prisma/client';
 import { PrismaService } from '../prisma/prisma.service';
+import { syncConstructeurLinks } from '../common/utils/constructeur-link.util';
 import { CreatePieceDto, UpdatePieceDto } from '../shared/dto/piece.dto';
 import { PieceModelStructureSchema } from '../shared/schemas/inventory';
 import type { PieceModelStructure } from '../shared/types/inventory';
@@ -8,16 +9,30 @@ import type { PieceModelStructure } from '../shared/types/inventory';
 const PIECE_WITH_RELATIONS_INCLUDE = {
   typePiece: {
     include: {
-      pieceCustomFields: true,
+      pieceCustomFields: {
+        orderBy: { orderIndex: 'asc' },
+      },
     },
   },
-  constructeur: true,
+  constructeurs: true,
   documents: true,
   customFieldValues: {
     include: {
       customField: true,
     },
   },
+  product: {
+    include: {
+      typeProduct: true,
+      constructeurs: true,
+      customFieldValues: {
+        include: {
+          customField: true,
+        },
+      },
+      documents: true,
+    },
+  },
   machineLinks: {
     include: {
       machine: true,
@@ -31,18 +46,20 @@ const PIECE_WITH_RELATIONS_INCLUDE = {
 export class PiecesService {
   constructor(private prisma: PrismaService) {}
 
-  private buildCreateInput(createPieceDto: CreatePieceDto): Prisma.PieceCreateInput {
+  private async buildCreateInput(
+    createPieceDto: CreatePieceDto,
+  ): Promise<{ data: Prisma.PieceCreateInput; constructeurIds: string[] }> {
     const data: Prisma.PieceCreateInput = {
       name: createPieceDto.name,
       reference: createPieceDto.reference ?? null,
       prix: createPieceDto.prix !== undefined ? createPieceDto.prix : null,
     };
 
-    if (createPieceDto.constructeurId) {
-      data.constructeur = {
-        connect: { id: createPieceDto.constructeurId },
-      };
-    }
+    const constructeurIds = this.normalizeConstructeurIds(
+      createPieceDto.constructeurIds,
+    );
+    const resolvedConstructeurIds =
+      await this.resolveExistingConstructeurIds(constructeurIds);
 
     if (createPieceDto.typePieceId) {
       data.typePiece = {
@@ -50,24 +67,69 @@ export class PiecesService {
       };
     }
 
-    return data;
+    if (createPieceDto.productId) {
+      const normalizedProductId = createPieceDto.productId.trim();
+      if (normalizedProductId) {
+        data.product = {
+          connect: { id: normalizedProductId },
+        };
+      }
+    }
+
+    return { data, constructeurIds: resolvedConstructeurIds };
   }
 
   async create(createPieceDto: CreatePieceDto) {
-    const created = await this.prisma.piece.create({
-      data: this.buildCreateInput(createPieceDto),
-      include: PIECE_WITH_RELATIONS_INCLUDE,
-    });
+    try {
+      const { data, constructeurIds } =
+        await this.buildCreateInput(createPieceDto);
 
-    await this.applyPieceSkeleton({
-      pieceId: created.id,
-      typePiece: created.typePiece as PieceTypeWithSkeleton | null,
-    });
+      const { pieceId, syncedConstructeurIds } = await this.prisma.$transaction(
+        async (tx) => {
+          const created = await tx.piece.create({
+            data,
+            include: PIECE_WITH_RELATIONS_INCLUDE,
+          });
 
-    return this.prisma.piece.findUnique({
-      where: { id: created.id },
-      include: PIECE_WITH_RELATIONS_INCLUDE,
-    });
+          let synced: string[] = [];
+          if (constructeurIds.length > 0) {
+            synced = await syncConstructeurLinks(
+              tx,
+              '_PieceConstructeurs',
+              created.id,
+              constructeurIds,
+            );
+          }
+
+          await this.applyPieceSkeleton({
+            pieceId: created.id,
+            typePiece: created.typePiece as PieceTypeWithSkeleton | null,
+            product: created.product,
+            prisma: tx,
+          });
+
+          return {
+            pieceId: created.id,
+            syncedConstructeurIds: synced,
+          };
+        },
+      );
+
+      const refreshed = await this.prisma.piece.findUnique({
+        where: { id: pieceId },
+        include: PIECE_WITH_RELATIONS_INCLUDE,
+      });
+
+      if (refreshed && syncedConstructeurIds.length > 0) {
+        (
+          refreshed as typeof refreshed & { constructeurIds?: string[] }
+        ).constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return refreshed;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
   }
 
   async findAll() {
@@ -99,10 +161,13 @@ export class PiecesService {
       data.prix = updatePieceDto.prix;
     }
 
-    if (updatePieceDto.constructeurId !== undefined) {
-      data.constructeur = updatePieceDto.constructeurId
-        ? { connect: { id: updatePieceDto.constructeurId } }
-        : { disconnect: true };
+    let resolvedConstructeurIds: string[] | undefined;
+    if (updatePieceDto.constructeurIds !== undefined) {
+      const constructeurIds = this.normalizeConstructeurIds(
+        updatePieceDto.constructeurIds,
+      );
+      resolvedConstructeurIds =
+        await this.resolveExistingConstructeurIds(constructeurIds);
     }
 
     if (updatePieceDto.typePieceId !== undefined) {
@@ -111,24 +176,112 @@ export class PiecesService {
         : { disconnect: true };
     }
 
-    const updated = await this.prisma.piece.update({
-      where: { id },
-      data,
-      include: PIECE_WITH_RELATIONS_INCLUDE,
-    });
+    if (updatePieceDto.productId !== undefined) {
+      const normalizedProductId =
+        typeof updatePieceDto.productId === 'string'
+          ? updatePieceDto.productId.trim()
+          : null;
+      data.product = normalizedProductId
+        ? { connect: { id: normalizedProductId } }
+        : { disconnect: true };
+    }
 
-    await this.applyPieceSkeleton({
-      pieceId: updated.id,
-      typePiece: updated.typePiece as PieceTypeWithSkeleton | null,
-    });
+    let syncedConstructeurIds: string[] | undefined;
+    try {
+      await this.prisma.$transaction(async (tx) => {
+        const updated = await tx.piece.update({
+          where: { id },
+          data,
+          include: PIECE_WITH_RELATIONS_INCLUDE,
+        });
 
-    return this.prisma.piece.findUnique({
-      where: { id: updated.id },
-      include: PIECE_WITH_RELATIONS_INCLUDE,
-    });
+        if (resolvedConstructeurIds !== undefined) {
+          syncedConstructeurIds = await syncConstructeurLinks(
+            tx,
+            '_PieceConstructeurs',
+            id,
+            resolvedConstructeurIds,
+          );
+        }
+
+        await this.applyPieceSkeleton({
+          pieceId: updated.id,
+          typePiece: updated.typePiece as PieceTypeWithSkeleton | null,
+          product: updated.product,
+          prisma: tx,
+        });
+      });
+
+      const refreshed = await this.prisma.piece.findUnique({
+        where: { id },
+        include: PIECE_WITH_RELATIONS_INCLUDE,
+      });
+
+      if (refreshed && syncedConstructeurIds) {
+        (
+          refreshed as typeof refreshed & { constructeurIds?: string[] }
+        ).constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return refreshed;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
   }
 
   async remove(id: string) {
+    const [machineLinksCount, documentsCount, customFieldValuesCount] =
+      await Promise.all([
+        this.prisma.machinePieceLink.count({
+          where: { pieceId: id },
+        }),
+        this.prisma.document.count({
+          where: { pieceId: id },
+        }),
+        this.prisma.customFieldValue.count({
+          where: { pieceId: id },
+        }),
+      ]);
+
+    const blockingReasons: string[] = [];
+
+    if (machineLinksCount > 0) {
+      blockingReasons.push(
+        `${machineLinksCount} liaison${machineLinksCount > 1 ? 's' : ''} machine`,
+      );
+    }
+    if (documentsCount > 0) {
+      blockingReasons.push(
+        `${documentsCount} document${documentsCount > 1 ? 's' : ''}`,
+      );
+    }
+
+    if (blockingReasons.length > 0) {
+      const messageParts = [
+        `Impossible de supprimer cette pièce car elle possède encore: ${blockingReasons.join(
+          ', ',
+        )}.`,
+      ];
+
+      if (customFieldValuesCount > 0) {
+        messageParts.push(
+          `Les ${customFieldValuesCount} valeur${
+            customFieldValuesCount > 1 ? 's' : ''
+          } de champ personnalisé seront supprimées automatiquement une fois ces éléments détachés.`,
+        );
+      }
+
+      throw new ConflictException(
+        `${messageParts.join(' ')} Supprimez ou détachez les éléments indiqués avant de réessayer.`,
+      );
+    }
+
+    if (customFieldValuesCount > 0) {
+      await this.prisma.customFieldValue.deleteMany({
+        where: { pieceId: id },
+      });
+    }
+
     return this.prisma.piece.delete({
       where: { id },
     });
@@ -137,9 +290,16 @@ export class PiecesService {
   private async applyPieceSkeleton({
     pieceId,
     typePiece,
+    product,
+    prisma,
   }: {
     pieceId: string;
     typePiece: PieceTypeWithSkeleton | null;
+    product: {
+      typeProductId: string | null;
+      typeProduct?: { code: string | null } | null;
+    } | null;
+    prisma: Prisma.TransactionClient | PrismaService;
   }) {
     if (!typePiece?.id) {
       return;
@@ -155,13 +315,142 @@ export class PiecesService {
     }
 
     const customFields = skeleton.customFields ?? [];
+    const productRequirements: PieceProductRequirement[] = Array.isArray(
+      skeleton.products,
+    )
+      ? skeleton.products.filter(
+          (entry): entry is PieceProductRequirement => !!entry,
+        )
+      : [];
 
-    await this.ensurePieceCustomFieldDefinitions(typePiece.id, customFields);
+    await this.ensurePieceCustomFieldDefinitions(
+      prisma,
+      typePiece.id,
+      customFields,
+    );
     await this.createPieceCustomFieldValues(
+      prisma,
       pieceId,
       typePiece.id,
       customFields,
     );
+
+    if (productRequirements.length > 0) {
+      await this.ensurePieceProductCompliance({
+        prisma,
+        pieceId,
+        product,
+        requirements: productRequirements,
+      });
+    }
+  }
+
+  private async ensurePieceProductCompliance({
+    prisma,
+    pieceId,
+    product,
+    requirements,
+  }: {
+    prisma: Prisma.TransactionClient | PrismaService;
+    pieceId: string;
+    product: {
+      typeProductId: string | null;
+      typeProduct?: { code: string | null } | null;
+    } | null;
+    requirements: PieceProductRequirement[];
+  }) {
+    const effectiveProduct =
+      product ??
+      (
+        await prisma.piece.findUnique({
+          where: { id: pieceId },
+          select: {
+            product: {
+              select: {
+                typeProductId: true,
+                typeProduct: {
+                  select: { code: true },
+                },
+              },
+            },
+          },
+        })
+      )?.product;
+
+    if (!effectiveProduct) {
+      throw new ConflictException(
+        'Ce type de pièce impose la sélection d’un produit catalogue.',
+      );
+    }
+
+    const matches = requirements.some((requirement) =>
+      this.doesProductMatchRequirement(effectiveProduct, requirement),
+    );
+
+    if (!matches) {
+      throw new ConflictException(
+        'Le produit associé ne respecte pas les exigences définies par le squelette.',
+      );
+    }
+  }
+
+  private doesProductMatchRequirement(
+    product: {
+      typeProductId: string | null;
+      typeProduct?: { code: string | null } | null;
+    },
+    requirement: PieceProductRequirement,
+  ): boolean {
+    if (!requirement) {
+      return false;
+    }
+
+    if ('typeProductId' in requirement && requirement.typeProductId) {
+      const expectedId = requirement.typeProductId.trim();
+      if (!expectedId) {
+        return false;
+      }
+      const currentId = product.typeProductId
+        ? product.typeProductId.trim()
+        : '';
+      return currentId === expectedId;
+    }
+
+    if ('familyCode' in requirement && requirement.familyCode) {
+      const expectedCode = requirement.familyCode.trim().toLowerCase();
+      if (!expectedCode) {
+        return false;
+      }
+      const productCode =
+        product.typeProduct?.code?.trim().toLowerCase() ?? null;
+      return productCode === expectedCode;
+    }
+
+    return false;
+  }
+
+  private normalizeConstructeurIds(ids?: string[] | null): string[] {
+    if (!Array.isArray(ids)) {
+      return [];
+    }
+    const cleaned = ids
+      .map((item) => (typeof item === 'string' ? item.trim() : ''))
+      .filter((item) => item.length > 0);
+    return Array.from(new Set(cleaned));
+  }
+
+  private async resolveExistingConstructeurIds(
+    ids: string[],
+  ): Promise<string[]> {
+    if (!ids.length) {
+      return [];
+    }
+    const existing = await this.prisma.constructeur.findMany({
+      where: { id: { in: ids } },
+      select: { id: true },
+    });
+    const existingIds = new Set(existing.map(({ id }) => id));
+    return ids.filter((id) => existingIds.has(id));
   }
 
   private parsePieceSkeleton(value: unknown): PieceModelStructure | null {
@@ -177,6 +466,7 @@ export class PiecesService {
   }
 
   private async ensurePieceCustomFieldDefinitions(
+    prisma: Prisma.TransactionClient | PrismaService,
     typePieceId: string,
     customFields: PieceModelStructure['customFields'],
   ) {
@@ -188,25 +478,37 @@ export class PiecesService {
       return;
     }
 
-    const existing = await this.prisma.customField.findMany({
+    const existing = await prisma.customField.findMany({
       where: { typePieceId },
-      select: { id: true, name: true },
+      select: { id: true, name: true, orderIndex: true },
     });
 
     const existingByName = new Map(
       existing.map((field) => [
         this.normalizeIdentifier(field.name) ?? field.name,
-        field.id,
+        field,
       ]),
     );
 
-    for (const field of customFields) {
+    for (let index = 0; index < customFields.length; index += 1) {
+      const field = customFields[index];
       if (!field) {
         continue;
       }
 
       const name = this.normalizeIdentifier(field.name);
-      if (!name || existingByName.has(name)) {
+      if (!name) {
+        continue;
+      }
+
+      const existingField = existingByName.get(name);
+      if (existingField) {
+        if (existingField.orderIndex !== index) {
+          await prisma.customField.update({
+            where: { id: existingField.id },
+            data: { orderIndex: index },
+          });
+        }
         continue;
       }
 
@@ -214,22 +516,24 @@ export class PiecesService {
       const required = Boolean(field.required);
       const options = this.normalizeOptions(field);
 
-      const created = await this.prisma.customField.create({
+      const created = await prisma.customField.create({
         data: {
           name,
           type,
           required,
           options,
+          orderIndex: index,
           typePieceId,
         },
-        select: { id: true },
+        select: { id: true, name: true, orderIndex: true },
       });
 
-      existingByName.set(name, created.id);
+      existingByName.set(name, created);
     }
   }
 
   private async createPieceCustomFieldValues(
+    prisma: Prisma.TransactionClient | PrismaService,
     pieceId: string,
     typePieceId: string,
     customFields: PieceModelStructure['customFields'],
@@ -242,7 +546,7 @@ export class PiecesService {
       return;
     }
 
-    const definitions = await this.prisma.customField.findMany({
+    const definitions = await prisma.customField.findMany({
       where: { typePieceId },
       select: { id: true, name: true },
     });
@@ -258,7 +562,7 @@ export class PiecesService {
       ]),
     );
 
-    const existingValues = await this.prisma.customFieldValue.findMany({
+    const existingValues = await prisma.customFieldValue.findMany({
       where: { pieceId },
       select: { customFieldId: true },
     });
@@ -282,7 +586,7 @@ export class PiecesService {
         continue;
       }
 
-      await this.prisma.customFieldValue.create({
+      await prisma.customFieldValue.create({
         data: {
           customFieldId: definitionId,
           pieceId,
@@ -343,10 +647,37 @@ export class PiecesService {
 
     return JSON.stringify(value);
   }
+
+  private handlePrismaError(error: unknown): never {
+    if (error instanceof Prisma.PrismaClientKnownRequestError) {
+      if (error.code === 'P2002' && this.isNameConstraint(error)) {
+        throw new ConflictException('Une pièce avec ce nom existe déjà.');
+      }
+    }
+
+    throw error;
+  }
+
+  private isNameConstraint(error: Prisma.PrismaClientKnownRequestError) {
+    const { target } = error.meta ?? {};
+    if (Array.isArray(target)) {
+      return target.includes('name');
+    }
+    if (typeof target === 'string') {
+      return target === 'name';
+    }
+    return false;
+  }
 }
 
 type PieceTypeWithSkeleton = Prisma.ModelTypeGetPayload<{
   include: { pieceCustomFields: true };
 }>;
 
-type PieceCustomFieldEntry = NonNullable<PieceModelStructure['customFields']>[number];
+type PieceCustomFieldEntry = NonNullable<
+  PieceModelStructure['customFields']
+>[number];
+
+type PieceProductRequirement = NonNullable<
+  PieceModelStructure['products']
+>[number];

src/products/dto/list-products.dto.ts

@@ -0,0 +1,49 @@
+import { IsEnum, IsInt, IsOptional, IsString, Max, Min } from 'class-validator';
+import { Type } from 'class-transformer';
+
+export enum ProductSortField {
+  NAME = 'name',
+  REFERENCE = 'reference',
+  CREATED_AT = 'createdAt',
+  SUPPLIER_PRICE = 'supplierPrice',
+}
+
+export enum SortDirection {
+  ASC = 'asc',
+  DESC = 'desc',
+}
+
+export class ListProductsQueryDto {
+  @IsOptional()
+  @IsString()
+  q?: string;
+
+  @IsOptional()
+  @IsString()
+  typeProductId?: string;
+
+  @IsOptional()
+  @IsString()
+  constructeurId?: string;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  @Max(100)
+  limit?: number;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(0)
+  offset?: number;
+
+  @IsOptional()
+  @IsEnum(ProductSortField)
+  sort?: ProductSortField;
+
+  @IsOptional()
+  @IsEnum(SortDirection)
+  dir?: SortDirection;
+}

src/products/products.controller.ts

@@ -0,0 +1,43 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
+import { ProductsService } from './products.service';
+import { CreateProductDto, UpdateProductDto } from '../shared/dto/product.dto';
+import { ListProductsQueryDto } from './dto/list-products.dto';
+
+@Controller('products')
+export class ProductsController {
+  constructor(private readonly productsService: ProductsService) {}
+
+  @Get()
+  list(@Query() query: ListProductsQueryDto) {
+    return this.productsService.list(query);
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string) {
+    return this.productsService.findOne(id);
+  }
+
+  @Post()
+  create(@Body() createProductDto: CreateProductDto) {
+    return this.productsService.create(createProductDto);
+  }
+
+  @Patch(':id')
+  update(@Param('id') id: string, @Body() updateProductDto: UpdateProductDto) {
+    return this.productsService.update(id, updateProductDto);
+  }
+
+  @Delete(':id')
+  remove(@Param('id') id: string) {
+    return this.productsService.remove(id);
+  }
+}

src/products/products.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { ProductsController } from './products.controller';
+import { ProductsService } from './products.service';
+
+@Module({
+  controllers: [ProductsController],
+  providers: [ProductsService],
+})
+export class ProductsModule {}

src/products/products.service.spec.ts

@@ -0,0 +1,240 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConflictException } from '@nestjs/common';
+import { Prisma, Product } from '@prisma/client';
+import { ProductsService } from './products.service';
+import { PrismaService } from '../prisma/prisma.service';
+import { syncConstructeurLinks } from '../common/utils/constructeur-link.util';
+import { CreateProductDto, UpdateProductDto } from '../shared/dto/product.dto';
+import { ProductSortField, SortDirection } from './dto/list-products.dto';
+
+jest.mock('../common/utils/constructeur-link.util', () => ({
+  syncConstructeurLinks: jest.fn().mockResolvedValue([]),
+}));
+
+describe('ProductsService', () => {
+  let service: ProductsService;
+  let prisma: {
+    product: any;
+    constructeur: any;
+    piece: any;
+    composant: any;
+    document: any;
+    $transaction: jest.Mock;
+  };
+  const mockSyncConstructeurLinks = syncConstructeurLinks as jest.Mock;
+
+  beforeEach(async () => {
+    prisma = {
+      product: {
+        findMany: jest.fn(),
+        count: jest.fn(),
+        findUnique: jest.fn(),
+        create: jest.fn(),
+        update: jest.fn(),
+        delete: jest.fn(),
+      },
+      constructeur: {
+        findMany: jest.fn(),
+      },
+      piece: {
+        count: jest.fn(),
+      },
+      composant: {
+        count: jest.fn(),
+      },
+      document: {
+        count: jest.fn(),
+      },
+      $transaction: jest.fn((arg: any) => {
+        if (Array.isArray(arg)) {
+          return Promise.all(arg);
+        }
+        if (typeof arg === 'function') {
+          return arg(prisma);
+        }
+        return Promise.resolve();
+      }),
+    };
+
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        ProductsService,
+        { provide: PrismaService, useValue: prisma },
+      ],
+    }).compile();
+
+    service = module.get<ProductsService>(ProductsService);
+    mockSyncConstructeurLinks.mockClear();
+  });
+
+  describe('list', () => {
+    it('returns products with mapped constructeur ids and pagination meta', async () => {
+      const product: Product & {
+        constructeurs: Array<{ id: string }>;
+        documents: any[];
+        customFieldValues: any[];
+        pieces: any[];
+        composants: any[];
+        typeProduct: null;
+      } = {
+        id: 'prod-1',
+        name: 'Product 1',
+        reference: 'P-001',
+        supplierPrice: new Prisma.Decimal(120),
+        createdAt: new Date(),
+        updatedAt: new Date(),
+        typeProductId: null,
+        constructeurs: [{ id: 'const-1' }],
+        documents: [],
+        customFieldValues: [],
+        pieces: [],
+        composants: [],
+        typeProduct: null,
+      };
+
+      prisma.product.findMany.mockResolvedValue([product]);
+      prisma.product.count.mockResolvedValue(1);
+
+      const result = await service.list({
+        q: ' Product ',
+        limit: 200,
+        sort: ProductSortField.NAME,
+        dir: SortDirection.ASC,
+      });
+
+      expect(prisma.product.findMany).toHaveBeenCalledWith(
+        expect.objectContaining({
+          where: expect.objectContaining({
+            OR: expect.any(Array),
+          }),
+          take: 100, // capped
+          orderBy: { name: 'asc' },
+        }),
+      );
+      expect(result.total).toBe(1);
+      expect(result.items[0]).toMatchObject({
+        id: 'prod-1',
+        constructeurIds: ['const-1'],
+      });
+    });
+  });
+
+  describe('create', () => {
+    it('persists a product and synchronizes constructeurs', async () => {
+      const dto: CreateProductDto = {
+        name: 'New Product',
+        supplierPrice: 150.5,
+        constructeurIds: ['const-1', 'const-1', ''],
+        typeProductId: 'type-1',
+      };
+
+      prisma.constructeur.findMany.mockResolvedValue([{ id: 'const-1' }]);
+      prisma.product.create.mockResolvedValue({
+        id: 'prod-1',
+      });
+      prisma.product.findUnique.mockResolvedValue({
+        id: 'prod-1',
+        name: dto.name,
+        reference: null,
+        supplierPrice: new Prisma.Decimal(150.5),
+        typeProductId: dto.typeProductId,
+        constructeurs: [{ id: 'const-1' }],
+        documents: [],
+        customFieldValues: [],
+        pieces: [],
+        composants: [],
+        typeProduct: null,
+      });
+      mockSyncConstructeurLinks.mockResolvedValue(['const-1']);
+
+      const created = await service.create(dto);
+
+      expect(prisma.product.create).toHaveBeenCalledWith(
+        expect.objectContaining({
+          data: expect.objectContaining({
+            name: 'New Product',
+            supplierPrice: expect.any(Prisma.Decimal),
+            typeProduct: { connect: { id: 'type-1' } },
+          }),
+        }),
+      );
+      expect(
+        String(prisma.product.create.mock.calls[0][0].data.supplierPrice),
+      ).toBe('150.5');
+      expect(mockSyncConstructeurLinks).toHaveBeenCalledWith(
+        expect.any(Object),
+        '_ProductConstructeurs',
+        'prod-1',
+        ['const-1'],
+      );
+      expect(created.constructeurIds).toEqual(['const-1']);
+    });
+  });
+
+  describe('update', () => {
+    it('updates product fields and synchronizes constructeurs when provided', async () => {
+      const dto: UpdateProductDto = {
+        supplierPrice: null,
+        constructeurIds: ['const-2'],
+        typeProductId: '',
+      };
+
+      prisma.constructeur.findMany.mockResolvedValue([{ id: 'const-2' }]);
+      prisma.product.findUnique.mockResolvedValue({
+        id: 'prod-1',
+        name: 'Existing product',
+        reference: null,
+        supplierPrice: null,
+        typeProductId: null,
+        constructeurs: [{ id: 'const-2' }],
+        documents: [],
+        customFieldValues: [],
+        pieces: [],
+        composants: [],
+        typeProduct: null,
+      });
+
+      await service.update('prod-1', dto);
+
+      expect(prisma.product.update).toHaveBeenCalledWith({
+        where: { id: 'prod-1' },
+        data: expect.objectContaining({
+          supplierPrice: null,
+          typeProduct: { disconnect: true },
+        }),
+      });
+      expect(mockSyncConstructeurLinks).toHaveBeenCalledWith(
+        expect.any(Object),
+        '_ProductConstructeurs',
+        'prod-1',
+        ['const-2'],
+      );
+    });
+  });
+
+  describe('remove', () => {
+    it('throws when product is still referenced', async () => {
+      prisma.piece.count.mockResolvedValue(1);
+      prisma.composant.count.mockResolvedValue(0);
+      prisma.document.count.mockResolvedValue(2);
+
+      await expect(service.remove('prod-1')).rejects.toBeInstanceOf(
+        ConflictException,
+      );
+      expect(prisma.product.delete).not.toHaveBeenCalled();
+    });
+
+    it('deletes product when no references remain', async () => {
+      prisma.piece.count.mockResolvedValue(0);
+      prisma.composant.count.mockResolvedValue(0);
+      prisma.document.count.mockResolvedValue(0);
+      prisma.product.delete.mockResolvedValue(undefined);
+
+      await service.remove('prod-1');
+
+      expect(prisma.product.delete).toHaveBeenCalledWith({
+        where: { id: 'prod-1' },
+      });
+    });
+  });
+});

src/products/products.service.ts

@@ -0,0 +1,322 @@
+import {
+  ConflictException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { Prisma } from '@prisma/client';
+import { PrismaService } from '../prisma/prisma.service';
+import { CreateProductDto, UpdateProductDto } from '../shared/dto/product.dto';
+import { PRODUCT_WITH_RELATIONS_INCLUDE } from '../common/constants/product-includes';
+import { syncConstructeurLinks } from '../common/utils/constructeur-link.util';
+import {
+  ListProductsQueryDto,
+  ProductSortField,
+  SortDirection,
+} from './dto/list-products.dto';
+
+type ProductWithRelations = Prisma.ProductGetPayload<{
+  include: typeof PRODUCT_WITH_RELATIONS_INCLUDE;
+}>;
+
+@Injectable()
+export class ProductsService {
+  private readonly allowedSortFields: ProductSortField[] = [
+    ProductSortField.CREATED_AT,
+    ProductSortField.NAME,
+    ProductSortField.REFERENCE,
+    ProductSortField.SUPPLIER_PRICE,
+  ];
+
+  constructor(private readonly prisma: PrismaService) {}
+
+  async list(params: ListProductsQueryDto) {
+    const {
+      q,
+      typeProductId,
+      constructeurId,
+      limit = 20,
+      offset = 0,
+      sort = ProductSortField.CREATED_AT,
+      dir = SortDirection.DESC,
+    } = params;
+
+    const cappedLimit = Math.min(Math.max(limit, 1), 100);
+    const safeOffset = Math.max(offset, 0);
+
+    const orderByField = this.allowedSortFields.includes(sort)
+      ? sort
+      : ProductSortField.CREATED_AT;
+    const orderByDir: SortDirection =
+      dir === SortDirection.ASC ? SortDirection.ASC : SortDirection.DESC;
+
+    const where: Prisma.ProductWhereInput = {};
+
+    if (q?.trim()) {
+      const term = q.trim();
+      where.OR = [
+        { name: { contains: term, mode: 'insensitive' } },
+        { reference: { contains: term, mode: 'insensitive' } },
+      ];
+    }
+
+    if (typeProductId) {
+      where.typeProductId = typeProductId;
+    }
+
+    if (constructeurId) {
+      where.constructeurs = {
+        some: { id: constructeurId },
+      };
+    }
+
+    const [items, total] = await this.prisma.$transaction([
+      this.prisma.product.findMany({
+        where,
+        include: PRODUCT_WITH_RELATIONS_INCLUDE,
+        orderBy: {
+          [orderByField]: orderByDir,
+        },
+        skip: safeOffset,
+        take: cappedLimit,
+      }),
+      this.prisma.product.count({ where }),
+    ]);
+
+    return {
+      items: items.map((item) => this.mapProduct(item)),
+      total,
+      offset: safeOffset,
+      limit: cappedLimit,
+    };
+  }
+
+  async findOne(id: string) {
+    const product = await this.prisma.product.findUnique({
+      where: { id },
+      include: PRODUCT_WITH_RELATIONS_INCLUDE,
+    });
+
+    if (!product) {
+      throw new NotFoundException('Produit introuvable.');
+    }
+
+    return this.mapProduct(product);
+  }
+
+  async create(createProductDto: CreateProductDto) {
+    try {
+      const data: Prisma.ProductCreateInput = {
+        name: createProductDto.name,
+        reference: createProductDto.reference ?? null,
+        supplierPrice:
+          createProductDto.supplierPrice === undefined ||
+          createProductDto.supplierPrice === null
+            ? null
+            : new Prisma.Decimal(createProductDto.supplierPrice),
+      };
+
+      if (createProductDto.typeProductId) {
+        data.typeProduct = {
+          connect: { id: createProductDto.typeProductId },
+        };
+      }
+
+      const constructeurIds = this.normalizeConstructeurIds(
+        createProductDto.constructeurIds,
+      );
+      const resolvedConstructeurIds =
+        await this.resolveExistingConstructeurIds(constructeurIds);
+
+      const created = await this.prisma.product.create({
+        data,
+        include: PRODUCT_WITH_RELATIONS_INCLUDE,
+      });
+
+      let syncedConstructeurIds: string[] = [];
+      if (resolvedConstructeurIds.length > 0) {
+        syncedConstructeurIds = await syncConstructeurLinks(
+          this.prisma,
+          '_ProductConstructeurs',
+          created.id,
+          resolvedConstructeurIds,
+        );
+      }
+
+      const refreshed = await this.prisma.product.findUnique({
+        where: { id: created.id },
+        include: PRODUCT_WITH_RELATIONS_INCLUDE,
+      });
+
+      if (!refreshed) {
+        return this.mapProduct(created);
+      }
+
+      const mapped = this.mapProduct(refreshed);
+      if (syncedConstructeurIds.length > 0) {
+        mapped.constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return mapped;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
+  }
+
+  async update(id: string, updateProductDto: UpdateProductDto) {
+    try {
+      const data: Prisma.ProductUpdateInput = {};
+
+      if (updateProductDto.name !== undefined) {
+        data.name = updateProductDto.name;
+      }
+
+      if (updateProductDto.reference !== undefined) {
+        data.reference = updateProductDto.reference;
+      }
+
+      if (updateProductDto.supplierPrice !== undefined) {
+        data.supplierPrice =
+          updateProductDto.supplierPrice === null
+            ? null
+            : new Prisma.Decimal(updateProductDto.supplierPrice);
+      }
+
+      if (updateProductDto.typeProductId !== undefined) {
+        data.typeProduct = updateProductDto.typeProductId
+          ? { connect: { id: updateProductDto.typeProductId } }
+          : { disconnect: true };
+      }
+
+      let resolvedConstructeurIds: string[] | undefined;
+      if (updateProductDto.constructeurIds !== undefined) {
+        const constructeurIds = this.normalizeConstructeurIds(
+          updateProductDto.constructeurIds,
+        );
+        resolvedConstructeurIds =
+          await this.resolveExistingConstructeurIds(constructeurIds);
+      }
+
+      let syncedConstructeurIds: string[] | undefined;
+
+      await this.prisma.$transaction(async (tx) => {
+        await tx.product.update({
+          where: { id },
+          data,
+        });
+
+        if (resolvedConstructeurIds !== undefined) {
+          syncedConstructeurIds = await syncConstructeurLinks(
+            tx,
+            '_ProductConstructeurs',
+            id,
+            resolvedConstructeurIds,
+          );
+        }
+      });
+
+      const refreshed = await this.prisma.product.findUnique({
+        where: { id },
+        include: PRODUCT_WITH_RELATIONS_INCLUDE,
+      });
+
+      if (!refreshed) {
+        throw new NotFoundException('Produit introuvable.');
+      }
+
+      const mapped = this.mapProduct(refreshed);
+      if (syncedConstructeurIds) {
+        mapped.constructeurIds = [...syncedConstructeurIds];
+      }
+
+      return mapped;
+    } catch (error) {
+      this.handlePrismaError(error);
+    }
+  }
+
+  async remove(id: string) {
+    const [pieceCount, componentCount, documentCount] = await Promise.all([
+      this.prisma.piece.count({
+        where: { productId: id },
+      }),
+      this.prisma.composant.count({
+        where: { productId: id },
+      }),
+      this.prisma.document.count({
+        where: { productId: id },
+      }),
+    ]);
+
+    const blockingReasons: string[] = [];
+    if (pieceCount > 0) {
+      blockingReasons.push(`${pieceCount} pièce${pieceCount > 1 ? 's' : ''}`);
+    }
+    if (componentCount > 0) {
+      blockingReasons.push(
+        `${componentCount} composant${componentCount > 1 ? 's' : ''}`,
+      );
+    }
+    if (documentCount > 0) {
+      blockingReasons.push(
+        `${documentCount} document${documentCount > 1 ? 's' : ''}`,
+      );
+    }
+
+    if (blockingReasons.length > 0) {
+      throw new ConflictException(
+        `Impossible de supprimer ce produit car il est encore lié à ${blockingReasons.join(
+          ', ',
+        )}.`,
+      );
+    }
+
+    await this.prisma.product.delete({
+      where: { id },
+    });
+  }
+
+  private normalizeConstructeurIds(ids?: string[] | null): string[] {
+    if (!Array.isArray(ids)) {
+      return [];
+    }
+    return Array.from(
+      new Set(
+        ids
+          .map((value) => (typeof value === 'string' ? value.trim() : ''))
+          .filter((value) => value.length > 0),
+      ),
+    );
+  }
+
+  private async resolveExistingConstructeurIds(ids: string[]) {
+    if (ids.length === 0) {
+      return [];
+    }
+    const existing = await this.prisma.constructeur.findMany({
+      where: { id: { in: ids } },
+      select: { id: true },
+    });
+    const existingIds = new Set(existing.map(({ id }) => id));
+    return ids.filter((id) => existingIds.has(id));
+  }
+
+  private mapProduct(product: ProductWithRelations) {
+    return {
+      ...product,
+      constructeurIds: product.constructeurs.map((item) => item.id),
+    };
+  }
+
+  private handlePrismaError(error: unknown): never {
+    if (error instanceof Prisma.PrismaClientKnownRequestError) {
+      if (error.code === 'P2002') {
+        throw new ConflictException('Un produit avec ce nom existe déjà.');
+      }
+      if (error.code === 'P2025') {
+        throw new NotFoundException('Produit introuvable.');
+      }
+    }
+
+    throw error;
+  }
+}

src/shared/dto/composant.dto.ts

@@ -1,4 +1,10 @@
-import { IsString, IsOptional, IsNumber, IsObject } from 'class-validator';
+import {
+  IsString,
+  IsOptional,
+  IsNumber,
+  IsObject,
+  IsArray,
+} from 'class-validator';
 import { Transform } from 'class-transformer';
 
 export class CreateComposantDto {
@@ -18,8 +24,10 @@ export class CreateComposantDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsOptional()
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @Transform(({ value }) => (value === '' ? null : value))
@@ -37,6 +45,10 @@ export class CreateComposantDto {
   @IsOptional()
   @IsObject()
   structure?: Record<string, any>;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
 }
 
 export class UpdateComposantDto {
@@ -49,8 +61,9 @@ export class UpdateComposantDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @Transform(({ value }) => (value === '' ? null : value))
@@ -64,4 +77,9 @@ export class UpdateComposantDto {
   @IsOptional()
   @IsObject()
   structure?: Record<string, any>;
+
+  @IsOptional()
+  @Transform(({ value }) => (value === '' ? null : value))
+  @IsString()
+  productId?: string | null;
 }

src/shared/dto/custom-field.dto.ts

@@ -11,6 +11,7 @@ export enum CustomFieldEntityType {
   MACHINE = 'machine',
   COMPOSANT = 'composant',
   PIECE = 'piece',
+  PRODUCT = 'product',
 }
 
 export class CustomFieldEntityParamsDto {
@@ -76,6 +77,10 @@ export class CreateCustomFieldValueDto {
   @IsOptional()
   @IsString()
   pieceId?: string;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
 }
 
 export class UpdateCustomFieldValueDto {

src/shared/dto/document.dto.ts

@@ -31,6 +31,10 @@ export class CreateDocumentDto {
   @IsOptional()
   @IsString()
   siteId?: string;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
 }
 
 export class UpdateDocumentDto {
@@ -57,4 +61,20 @@ export class UpdateDocumentDto {
   @IsOptional()
   @IsString()
   siteId?: string;
+
+  @IsOptional()
+  @IsString()
+  machineId?: string;
+
+  @IsOptional()
+  @IsString()
+  composantId?: string;
+
+  @IsOptional()
+  @IsString()
+  pieceId?: string;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
 }

src/shared/dto/machine.dto.ts

@@ -28,6 +28,10 @@ export class MachineComponentLinkPayloadDto {
   @IsString()
   composantId?: string;
 
+  @IsOptional()
+  @IsString()
+  productId?: string;
+
   @IsOptional()
   @IsString()
   componentId?: string;
@@ -97,6 +101,10 @@ export class MachinePieceLinkPayloadDto {
   @IsString()
   composantId?: string;
 
+  @IsOptional()
+  @IsString()
+  productId?: string;
+
   @IsOptional()
   @IsString()
   parentLinkId?: string;
@@ -142,6 +150,59 @@ export class MachinePieceLinkPayloadDto {
   overrides?: Record<string, unknown>;
 }
 
+export class MachineProductLinkPayloadDto {
+  @IsOptional()
+  @IsString()
+  id?: string;
+
+  @IsOptional()
+  @IsString()
+  linkId?: string;
+
+  @IsString()
+  requirementId: string;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
+
+  @IsOptional()
+  @IsString()
+  typeProductId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentLinkId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentComponentLinkId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentPieceLinkId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentRequirementId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentComponentRequirementId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentPieceRequirementId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentMachineComponentRequirementId?: string;
+
+  @IsOptional()
+  @IsString()
+  parentMachinePieceRequirementId?: string;
+}
+
 export class CreateMachineDto {
   @IsString()
   name: string;
@@ -154,8 +215,9 @@ export class CreateMachineDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @IsDecimal()
@@ -176,6 +238,12 @@ export class CreateMachineDto {
   @ValidateNested({ each: true })
   @Type(() => MachinePieceLinkPayloadDto)
   pieceLinks?: MachinePieceLinkPayloadDto[];
+
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => MachineProductLinkPayloadDto)
+  productLinks?: MachineProductLinkPayloadDto[];
 }
 
 export class UpdateMachineDto {
@@ -188,8 +256,9 @@ export class UpdateMachineDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @IsDecimal()
@@ -212,7 +281,14 @@ export class ReconfigureMachineDto {
   @ValidateNested({ each: true })
   @Type(() => MachinePieceLinkPayloadDto)
   pieceLinks?: MachinePieceLinkPayloadDto[];
+
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => MachineProductLinkPayloadDto)
+  productLinks?: MachineProductLinkPayloadDto[];
 }
 
 export type MachineComponentLinkInput = MachineComponentLinkPayloadDto;
 export type MachinePieceLinkInput = MachinePieceLinkPayloadDto;
+export type MachineProductLinkInput = MachineProductLinkPayloadDto;

src/shared/dto/piece.dto.ts

@@ -1,4 +1,4 @@
-import { IsString, IsOptional, IsNumber } from 'class-validator';
+import { IsString, IsOptional, IsNumber, IsArray } from 'class-validator';
 import { Transform } from 'class-transformer';
 
 export class CreatePieceDto {
@@ -18,8 +18,10 @@ export class CreatePieceDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsOptional()
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @Transform(({ value }) => (value === '' ? null : value))
@@ -33,6 +35,10 @@ export class CreatePieceDto {
   @IsOptional()
   @IsString()
   typeMachinePieceRequirementId?: string;
+
+  @IsOptional()
+  @IsString()
+  productId?: string;
 }
 
 export class UpdatePieceDto {
@@ -45,8 +51,10 @@ export class UpdatePieceDto {
   reference?: string;
 
   @IsOptional()
-  @IsString()
-  constructeurId?: string;
+  @IsOptional()
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
 
   @IsOptional()
   @Transform(({ value }) => (value === '' ? null : value))
@@ -56,4 +64,9 @@ export class UpdatePieceDto {
   @IsOptional()
   @IsString()
   typePieceId?: string;
+
+  @IsOptional()
+  @Transform(({ value }) => (value === '' ? null : value))
+  @IsString()
+  productId?: string | null;
 }

src/shared/dto/product.dto.ts

@@ -0,0 +1,28 @@
+import { IsArray, IsNumber, IsOptional, IsString } from 'class-validator';
+import { Transform } from 'class-transformer';
+import { PartialType } from '@nestjs/mapped-types';
+
+export class CreateProductDto {
+  @IsString()
+  name!: string;
+
+  @IsOptional()
+  @IsString()
+  reference?: string;
+
+  @IsOptional()
+  @Transform(({ value }) => (value === '' ? null : value))
+  @IsNumber({}, { message: 'supplierPrice must be a valid number' })
+  supplierPrice?: number | null;
+
+  @IsOptional()
+  @IsString()
+  typeProductId?: string;
+
+  @IsOptional()
+  @IsArray()
+  @IsString({ each: true })
+  constructeurIds?: string[];
+}
+
+export class UpdateProductDto extends PartialType(CreateProductDto) {}

src/shared/dto/type.dto.ts

@@ -36,6 +36,10 @@ export class CreateCustomFieldDto {
   @IsOptional()
   @IsArray()
   options?: string[]; // Pour les champs de type SELECT
+
+  @IsOptional()
+  @IsInt()
+  orderIndex?: number;
 }
 
 export class UpdateCustomFieldDto {
@@ -54,6 +58,10 @@ export class UpdateCustomFieldDto {
   @IsOptional()
   @IsArray()
   options?: string[];
+
+  @IsOptional()
+  @IsInt()
+  orderIndex?: number;
 }
 
 export class TypeMachineComponentRequirementDto {
@@ -79,6 +87,10 @@ export class TypeMachineComponentRequirementDto {
   @IsOptional()
   @IsBoolean()
   allowNewModels?: boolean;
+
+  @IsOptional()
+  @IsInt()
+  orderIndex?: number;
 }
 
 export class TypeMachinePieceRequirementDto {
@@ -104,6 +116,39 @@ export class TypeMachinePieceRequirementDto {
   @IsOptional()
   @IsBoolean()
   allowNewModels?: boolean;
+
+  @IsOptional()
+  @IsInt()
+  orderIndex?: number;
+}
+
+export class TypeMachineProductRequirementDto {
+  @IsString()
+  typeProductId: string;
+
+  @IsOptional()
+  @IsString()
+  label?: string;
+
+  @IsOptional()
+  @IsInt()
+  minCount?: number;
+
+  @IsOptional()
+  @IsInt()
+  maxCount?: number | null;
+
+  @IsOptional()
+  @IsBoolean()
+  required?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  allowNewModels?: boolean;
+
+  @IsOptional()
+  @IsInt()
+  orderIndex?: number;
 }
 
 export class CreateTypeMachineDto {
@@ -145,6 +190,12 @@ export class CreateTypeMachineDto {
   @ValidateNested({ each: true })
   @Type(() => TypeMachinePieceRequirementDto)
   pieceRequirements?: TypeMachinePieceRequirementDto[];
+
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => TypeMachineProductRequirementDto)
+  productRequirements?: TypeMachineProductRequirementDto[];
 }
 
 export class UpdateTypeMachineDto {
@@ -187,6 +238,12 @@ export class UpdateTypeMachineDto {
   @ValidateNested({ each: true })
   @Type(() => TypeMachinePieceRequirementDto)
   pieceRequirements?: TypeMachinePieceRequirementDto[];
+
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => TypeMachineProductRequirementDto)
+  productRequirements?: TypeMachineProductRequirementDto[];
 }
 
 export class CreateTypeComposantDto {

src/shared/schemas/inventory.ts

@@ -2,7 +2,9 @@ import { normalizeComponentModelStructure } from '../../component-models/structu
 import type {
   ComponentModelStructure,
   PieceModelCustomField,
+  PieceModelProduct,
   PieceModelStructure,
+  ProductModelStructure,
 } from '../types/inventory';
 
 export class ComponentModelStructureValidationError extends Error {
@@ -28,6 +30,67 @@ function sanitizeOptionalString(value: unknown): string | undefined {
   return String(value);
 }
 
+function validateProducts(
+  products: ComponentModelStructure['products'],
+): ComponentModelStructure['products'] {
+  return products.map((product, index) => {
+    if ('typeProductId' in product) {
+      const typeProductId = assertString(
+        product.typeProductId,
+        `products[${index}].typeProductId`,
+      ).trim();
+      if (!typeProductId) {
+        throw new ComponentModelStructureValidationError(
+          `products[${index}].typeProductId ne peut pas être vide`,
+        );
+      }
+      const payload: ComponentModelStructure['products'][number] = {
+        typeProductId,
+        role: sanitizeOptionalString(product.role),
+      };
+      if ('familyCode' in product && product.familyCode) {
+        const familyCode = assertString(
+          product.familyCode,
+          `products[${index}].familyCode`,
+        ).trim();
+        if (familyCode) {
+          (payload as Record<string, unknown>).familyCode = familyCode;
+        }
+      }
+      if ('reference' in product && product.reference) {
+        (payload as Record<string, unknown>).reference = sanitizeOptionalString(
+          product.reference,
+        );
+      }
+      if ('typeProductLabel' in product && product.typeProductLabel) {
+        (payload as Record<string, unknown>).typeProductLabel =
+          sanitizeOptionalString(product.typeProductLabel);
+      }
+      return payload;
+    }
+
+    if ('familyCode' in product) {
+      const familyCode = assertString(
+        product.familyCode,
+        `products[${index}].familyCode`,
+      ).trim();
+      if (!familyCode) {
+        throw new ComponentModelStructureValidationError(
+          `products[${index}].familyCode ne peut pas être vide`,
+        );
+      }
+      return {
+        familyCode,
+        role: sanitizeOptionalString(product.role),
+      };
+    }
+
+    throw new ComponentModelStructureValidationError(
+      `products[${index}] doit définir "familyCode" ou "typeProductId"`,
+    );
+  });
+}
+
 function validatePieces(
   pieces: ComponentModelStructure['pieces'],
 ): ComponentModelStructure['pieces'] {
@@ -148,6 +211,7 @@ export const ComponentModelStructureSchema = {
     const normalized = normalizeComponentModelStructure(input);
 
     return {
+      products: validateProducts(normalized.products),
       pieces: validatePieces(normalized.pieces),
       customFields: validateCustomFields(normalized.customFields),
       subcomponents: validateSubcomponents(normalized.subcomponents),
@@ -230,10 +294,57 @@ function normalizePieceModelCustomFields(
   return normalized;
 }
 
+function normalizePieceModelProducts(products: unknown): PieceModelProduct[] {
+  if (!Array.isArray(products)) {
+    return [];
+  }
+
+  return products.map((entry, index) => {
+    if (!entry || typeof entry !== 'object' || Array.isArray(entry)) {
+      throw new PieceModelStructureValidationError(
+        `products[${index}] doit être un objet`,
+      );
+    }
+
+    const record = entry as Record<string, unknown>;
+
+    const rawTypeProductId =
+      typeof record.typeProductId === 'string'
+        ? record.typeProductId
+        : typeof (record.typeProduct as { id?: unknown })?.id === 'string'
+          ? (record.typeProduct as { id: string }).id
+          : undefined;
+    const typeProductId = rawTypeProductId ? rawTypeProductId.trim() : '';
+
+    const rawFamilyCode =
+      typeof record.familyCode === 'string'
+        ? record.familyCode
+        : typeof (record.typeProduct as { code?: unknown })?.code === 'string'
+          ? (record.typeProduct as { code: string }).code
+          : undefined;
+    const familyCode = rawFamilyCode ? rawFamilyCode.trim() : '';
+
+    const rawRole = typeof record.role === 'string' ? record.role.trim() : '';
+    const role = rawRole ? rawRole : undefined;
+
+    if (typeProductId) {
+      return role ? { typeProductId, role } : { typeProductId };
+    }
+
+    if (familyCode) {
+      return role ? { familyCode, role } : { familyCode };
+    }
+
+    throw new PieceModelStructureValidationError(
+      `products[${index}] doit définir "familyCode" ou "typeProductId"`,
+    );
+  });
+}
+
 export const PieceModelStructureSchema = {
   parse(input: unknown): PieceModelStructure {
     if (input === undefined || input === null) {
-      return { customFields: [] };
+      return { customFields: [], products: [] };
     }
 
     if (typeof input !== 'object' || Array.isArray(input)) {
@@ -250,6 +361,11 @@ export const PieceModelStructureSchema = {
       structure.customFields = customFields;
     }
 
+    const products = normalizePieceModelProducts(record.products);
+    if (products.length > 0 || 'products' in record) {
+      structure.products = products;
+    }
+
     const normalizedTypePiece = toStringOrNull(record.typePieceId);
     if (normalizedTypePiece) {
       structure.typePieceId = normalizedTypePiece;
@@ -260,3 +376,34 @@ export const PieceModelStructureSchema = {
     return structure;
   },
 };
+
+export class ProductModelStructureValidationError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'ProductModelStructureValidationError';
+  }
+}
+
+export const ProductModelStructureSchema = {
+  parse(input: unknown): ProductModelStructure {
+    if (input === undefined || input === null) {
+      return { customFields: [] };
+    }
+
+    if (typeof input !== 'object' || Array.isArray(input)) {
+      throw new ProductModelStructureValidationError(
+        'La structure de produit doit être un objet JSON.',
+      );
+    }
+
+    const record = input as Record<string, unknown>;
+    const structure: ProductModelStructure = { ...record };
+    const customFields = normalizePieceModelCustomFields(record.customFields);
+
+    if (customFields.length > 0 || 'customFields' in record) {
+      structure.customFields = customFields;
+    }
+
+    return structure;
+  },
+};

src/shared/types/constructeur-summary.type.ts

@@ -0,0 +1,6 @@
+export type ConstructeurSummary = {
+  id: string;
+  name: string | null;
+  email: string | null;
+  phone: string | null;
+};

src/shared/types/inventory.ts

@@ -16,6 +16,20 @@ export type ComponentModelStructure = {
       }
   >;
 
+  /**
+   * Familles de produits autorisées (ou identifiant de famille) — pas de quantité ici.
+   */
+  products: Array<
+    | {
+        familyCode: string;
+        role?: string;
+      }
+    | {
+        typeProductId: string;
+        role?: string;
+      }
+  >;
+
   /**
    * Valeurs par défaut au niveau "modèle" (libres, mais clé obligatoire).
    */
@@ -48,7 +62,25 @@ export type PieceModelCustomField = {
   options?: unknown;
 };
 
+export type PieceModelProduct =
+  | {
+      familyCode: string;
+      role?: string;
+    }
+  | {
+      typeProductId: string;
+      role?: string;
+    };
+
 export type PieceModelStructure = {
   customFields?: PieceModelCustomField[];
+  products?: PieceModelProduct[];
+  [key: string]: unknown;
+};
+
+export type ProductModelCustomField = PieceModelCustomField;
+
+export type ProductModelStructure = {
+  customFields?: ProductModelCustomField[];
   [key: string]: unknown;
 };

src/types/services/type-machine.service.ts

@@ -1,4 +1,5 @@
-import { Injectable } from '@nestjs/common';
+import { ConflictException, Injectable } from '@nestjs/common';
+import { Prisma } from '@prisma/client';
 import { TypeMachinesRepository } from '../../common/repositories/type-machines.repository';
 import {
   TYPE_MACHINE_DEFAULT_INCLUDE,
@@ -17,7 +18,12 @@ export class TypeMachineService {
   async create(dto: CreateTypeMachineDto) {
     const data = TypeMachineMapper.toCreateInput(dto);
 
-    return this.repository.create(data, TYPE_MACHINE_DEFAULT_INCLUDE);
+    try {
+      return await this.repository.create(data, TYPE_MACHINE_DEFAULT_INCLUDE);
+    } catch (error) {
+      this.handlePrismaError(error);
+      throw error;
+    }
   }
 
   async findAll() {
@@ -53,7 +59,24 @@ export class TypeMachineService {
       await this.repository.createPieceRequirements(id, requirements);
     }
 
-    return this.repository.update(id, updateData, TYPE_MACHINE_DEFAULT_INCLUDE);
+    if (dto.productRequirements !== undefined) {
+      await this.repository.deleteProductRequirements(id);
+      const requirements = TypeMachineMapper.mapProductRequirementInputs(
+        dto.productRequirements,
+      );
+      await this.repository.createProductRequirements(id, requirements);
+    }
+
+    try {
+      return await this.repository.update(
+        id,
+        updateData,
+        TYPE_MACHINE_DEFAULT_INCLUDE,
+      );
+    } catch (error) {
+      this.handlePrismaError(error);
+      throw error;
+    }
   }
 
   async remove(id: string) {
@@ -69,4 +92,19 @@ export class TypeMachineService {
     await this.repository.deleteCustomFields(id);
     return this.repository.delete(id);
   }
+
+  private handlePrismaError(error: unknown): never {
+    if (error instanceof Prisma.PrismaClientKnownRequestError) {
+      if (
+        error.code === 'P2002' &&
+        Array.isArray(error.meta?.target) &&
+        error.meta.target.includes('name')
+      ) {
+        throw new ConflictException(
+          'Nom déjà utilisé pour un type de machine.',
+        );
+      }
+    }
+    throw error;
+  }
 }

test/app.e2e-spec.ts

@@ -73,7 +73,7 @@ type MachineRecord = {
   id: string;
   name: string;
   reference: Nullable<string>;
-  constructeurId: Nullable<string>;
+  constructeurIds: string[];
   prix: Nullable<string>;
   siteId: string;
   typeMachineId: Nullable<string>;
@@ -90,7 +90,7 @@ type ComposantRecord = {
   parentComposantId: Nullable<string>;
   typeComposantId: Nullable<string>;
   typeMachineComponentRequirementId: Nullable<string>;
-  constructeurId: Nullable<string>;
+  constructeurIds: string[];
   createdAt: Date;
   updatedAt: Date;
 };
@@ -104,7 +104,16 @@ type PieceRecord = {
   composantId: Nullable<string>;
   typePieceId: Nullable<string>;
   typeMachinePieceRequirementId: Nullable<string>;
-  constructeurId: Nullable<string>;
+  constructeurIds: string[];
+  createdAt: Date;
+  updatedAt: Date;
+};
+
+type ConstructeurRecord = {
+  id: string;
+  name: string;
+  email: Nullable<string>;
+  phone: Nullable<string>;
   createdAt: Date;
   updatedAt: Date;
 };
@@ -202,6 +211,15 @@ class InMemoryPrismaService {
   private customFields: CustomFieldRecord[] = [];
   private customFieldValues: CustomFieldValueRecord[] = [];
   private profiles: ProfileRecord[] = [];
+  private constructeurs: ConstructeurRecord[] = [];
+  private readonly constructeurLinkOrientation: Record<
+    string,
+    { parentColumn: 'A' | 'B'; constructeurColumn: 'A' | 'B' }
+  > = {
+    _MachineConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+    _ComposantConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+    _PieceConstructeurs: { parentColumn: 'A', constructeurColumn: 'B' },
+  };
 
   async onModuleInit() {}
   async onModuleDestroy() {}
@@ -229,6 +247,7 @@ class InMemoryPrismaService {
     this.customFields = [];
     this.customFieldValues = [];
     this.profiles = [];
+    this.constructeurs = [];
   }
 
   private readonly modelTypeDelegate = {
@@ -638,11 +657,12 @@ class InMemoryPrismaService {
   machine = {
     create: async ({ data, include }: any) => {
       const now = new Date();
+      const constructeurIds = this.extractConstructeurIds(data.constructeurs);
       const record: MachineRecord = {
         id: generateId('machine'),
         name: data.name,
         reference: data.reference ?? null,
-        constructeurId: data.constructeurId ?? null,
+        constructeurIds,
         prix: data.prix ?? null,
         siteId: data.siteId,
         typeMachineId: data.typeMachineId ?? null,
@@ -683,6 +703,7 @@ class InMemoryPrismaService {
   composant = {
     create: async ({ data }: any) => {
       const now = new Date();
+      const constructeurIds = this.extractConstructeurIds(data.constructeurs);
       const record: ComposantRecord = {
         id: generateId('component'),
         name: data.name,
@@ -693,7 +714,7 @@ class InMemoryPrismaService {
         typeComposantId: data.typeComposantId ?? null,
         typeMachineComponentRequirementId:
           data.typeMachineComponentRequirementId ?? null,
-        constructeurId: data.constructeurId ?? null,
+        constructeurIds,
         createdAt: now,
         updatedAt: now,
       };
@@ -719,6 +740,7 @@ class InMemoryPrismaService {
   piece = {
     create: async ({ data }: any) => {
       const now = new Date();
+      const constructeurIds = this.extractConstructeurIds(data.constructeurs);
       const record: PieceRecord = {
         id: generateId('piece'),
         name: data.name,
@@ -729,7 +751,7 @@ class InMemoryPrismaService {
         typePieceId: data.typePieceId ?? null,
         typeMachinePieceRequirementId:
           data.typeMachinePieceRequirementId ?? null,
-        constructeurId: data.constructeurId ?? null,
+        constructeurIds,
         createdAt: now,
         updatedAt: now,
       };
@@ -767,7 +789,7 @@ class InMemoryPrismaService {
         prixOverride:
           data.prixOverride !== undefined && data.prixOverride !== null
             ? String(data.prixOverride)
-            : data.prixOverride ?? null,
+            : (data.prixOverride ?? null),
         createdAt: now,
         updatedAt: now,
       };
@@ -819,7 +841,7 @@ class InMemoryPrismaService {
         prixOverride:
           data.prixOverride !== undefined && data.prixOverride !== null
             ? String(data.prixOverride)
-            : data.prixOverride ?? null,
+            : (data.prixOverride ?? null),
         createdAt: now,
         updatedAt: now,
       };
@@ -848,7 +870,9 @@ class InMemoryPrismaService {
           (link) => link.parentLinkId === where.parentLinkId,
         );
       }
-      return links.map((link) => this.buildMachinePieceLink(link, include ?? {}));
+      return links.map((link) =>
+        this.buildMachinePieceLink(link, include ?? {}),
+      );
     },
   };
 
@@ -979,6 +1003,120 @@ class InMemoryPrismaService {
     },
   };
 
+  constructeur = {
+    findMany: async ({ where, select, orderBy }: any = {}) => {
+      let records = [...this.constructeurs];
+
+      if (where?.id?.in) {
+        const ids = Array.isArray(where.id.in) ? where.id.in : [];
+        records = records.filter((item) => ids.includes(item.id));
+      }
+
+      if (where?.OR && Array.isArray(where.OR)) {
+        const termCandidate = where.OR.find(
+          (clause: any) => clause?.name?.contains,
+        );
+        const term =
+          termCandidate?.name?.contains ??
+          termCandidate?.email?.contains ??
+          termCandidate?.phone?.contains ??
+          '';
+        const normalized = term.toLowerCase().trim();
+        if (normalized) {
+          records = records.filter((record) => {
+            const nameMatch = record.name.toLowerCase().includes(normalized);
+            const emailMatch =
+              record.email?.toLowerCase().includes(normalized) ?? false;
+            const phoneMatch =
+              record.phone?.toLowerCase().includes(normalized) ?? false;
+            return nameMatch || emailMatch || phoneMatch;
+          });
+        }
+      }
+
+      if (orderBy?.name) {
+        records = [...records].sort((a, b) =>
+          orderBy.name === 'desc'
+            ? b.name.localeCompare(a.name)
+            : a.name.localeCompare(b.name),
+        );
+      }
+
+      return records.map((record) => this.applySelect(record, select));
+    },
+
+    findUnique: async ({ where, select }: any) => {
+      const record = this.constructeurs.find((item) => item.id === where?.id);
+      return record ? this.applySelect(record, select) : null;
+    },
+
+    findFirst: async ({ where, select }: any = {}) => {
+      if (where?.name?.equals) {
+        const target = where.name.equals.toLowerCase();
+        const record = this.constructeurs.find(
+          (item) => item.name.toLowerCase() === target,
+        );
+        return record ? this.applySelect(record, select) : null;
+      }
+      return null;
+    },
+
+    create: async ({ data, select }: any) => {
+      const now = new Date();
+      const record: ConstructeurRecord = {
+        id: data.id ?? generateId('constructeur'),
+        name: data.name?.trim?.() ?? '',
+        email: data.email?.trim?.() ?? null,
+        phone: data.phone?.trim?.() ?? null,
+        createdAt: now,
+        updatedAt: now,
+      };
+      this.constructeurs.push(record);
+      return this.applySelect(record, select);
+    },
+
+    update: async ({ where, data, select }: any) => {
+      const record = this.constructeurs.find((item) => item.id === where?.id);
+      if (!record) {
+        throw new Error('Constructeur not found');
+      }
+      if (data.name !== undefined) {
+        record.name =
+          this.applyUpdateValue<string>(data.name)?.trim?.() ?? record.name;
+      }
+      if (data.email !== undefined) {
+        record.email =
+          this.applyUpdateValue<string | null>(data.email)?.trim?.() ?? null;
+      }
+      if (data.phone !== undefined) {
+        record.phone =
+          this.applyUpdateValue<string | null>(data.phone)?.trim?.() ?? null;
+      }
+      record.updatedAt = new Date();
+      return this.applySelect(record, select);
+    },
+
+    delete: async ({ where, select }: any) => {
+      const index = this.constructeurs.findIndex(
+        (item) => item.id === where?.id,
+      );
+      if (index === -1) {
+        throw new Error('Constructeur not found');
+      }
+      const [deleted] = this.constructeurs.splice(index, 1);
+      return this.applySelect(deleted, select);
+    },
+  };
+
+  async __getConstructeurLinkOrientation(table: string) {
+    return (
+      this.constructeurLinkOrientation[table] ?? {
+        parentColumn: 'A',
+        constructeurColumn: 'B',
+      }
+    );
+  }
+
   profile = {
     count: async ({ where }: any) => {
       return this.profiles.filter((profile) => {
@@ -1279,6 +1417,71 @@ class InMemoryPrismaService {
     return base;
   }
 
+  private extractConstructeurIds(input: any): string[] {
+    if (!input) {
+      return [];
+    }
+
+    const source = Array.isArray(input.set)
+      ? input.set
+      : Array.isArray(input.connect)
+        ? input.connect
+        : [];
+
+    return source
+      .map((entry: any) => (typeof entry?.id === 'string' ? entry.id : null))
+      .filter((id: string | null): id is string => Boolean(id));
+  }
+
+  private mapConstructeurs(ids: string[] = []) {
+    if (!Array.isArray(ids) || ids.length === 0) {
+      return [];
+    }
+
+    return ids
+      .map((id) =>
+        this.constructeurs.find((constructeur) => constructeur.id === id),
+      )
+      .filter((item): item is (typeof this.constructeurs)[number] =>
+        Boolean(item),
+      )
+      .map((item) => ({ ...item }));
+  }
+
+  async __syncConstructeurLinks(
+    table: string,
+    parentId: string,
+    ids: string[],
+  ): Promise<void> {
+    const filtered = ids.filter((id) =>
+      this.constructeurs.some((item) => item.id === id),
+    );
+
+    switch (table) {
+      case '_MachineConstructeurs':
+        this.assignConstructeurs(this.machines, parentId, filtered);
+        break;
+      case '_ComposantConstructeurs':
+        this.assignConstructeurs(this.composants, parentId, filtered);
+        break;
+      case '_PieceConstructeurs':
+        this.assignConstructeurs(this.pieces, parentId, filtered);
+        break;
+      default:
+        throw new Error(`Unsupported constructeur link table: ${table}`);
+    }
+  }
+
+  private assignConstructeurs<
+    T extends { id: string; constructeurIds: string[] },
+  >(collection: T[], parentId: string, ids: string[]) {
+    const record = collection.find((item) => item.id === parentId);
+    if (!record) {
+      return;
+    }
+    record.constructeurIds = [...ids];
+  }
+
   private buildMachine(machine: MachineRecord, include: any) {
     const base: any = { ...machine };
 
@@ -1309,8 +1512,8 @@ class InMemoryPrismaService {
       }
     }
 
-    if (include?.constructeur) {
-      base.constructeur = null;
+    if (include?.constructeurs) {
+      base.constructeurs = this.mapConstructeurs(machine.constructeurIds);
     }
 
     if (include?.componentLinks) {
@@ -1389,19 +1592,19 @@ class InMemoryPrismaService {
 
     if (include?.typeMachineComponentRequirement) {
       const requirement = link.typeMachineComponentRequirementId
-        ? this.typeMachineComponentRequirements.find(
+        ? (this.typeMachineComponentRequirements.find(
             (item) => item.id === link.typeMachineComponentRequirementId,
-          ) ?? null
+          ) ?? null)
         : null;
       base.typeMachineComponentRequirement = requirement
         ? {
             ...requirement,
-            typeComposant:
-              include.typeMachineComponentRequirement.include?.typeComposant
-                ? this.typeComposants.find(
-                    (item) => item.id === requirement.typeComposantId,
-                  ) ?? null
-                : undefined,
+            typeComposant: include.typeMachineComponentRequirement.include
+              ?.typeComposant
+              ? (this.typeComposants.find(
+                  (item) => item.id === requirement.typeComposantId,
+                ) ?? null)
+              : undefined,
           }
         : null;
     }
@@ -1419,14 +1622,12 @@ class InMemoryPrismaService {
     return base;
   }
 
-  private buildMachinePieceLink(
-    link: MachinePieceLinkRecord,
-    include: any,
-  ) {
+  private buildMachinePieceLink(link: MachinePieceLinkRecord, include: any) {
     const base: any = { ...link };
 
     if (include?.piece) {
-      const piece = this.pieces.find((item) => item.id === link.pieceId) ?? null;
+      const piece =
+        this.pieces.find((item) => item.id === link.pieceId) ?? null;
       base.piece = piece
         ? this.buildPiece(piece, include.piece.include ?? {})
         : null;
@@ -1434,19 +1635,18 @@ class InMemoryPrismaService {
 
     if (include?.typeMachinePieceRequirement) {
       const requirement = link.typeMachinePieceRequirementId
-        ? this.typeMachinePieceRequirements.find(
+        ? (this.typeMachinePieceRequirements.find(
             (item) => item.id === link.typeMachinePieceRequirementId,
-          ) ?? null
+          ) ?? null)
         : null;
       base.typeMachinePieceRequirement = requirement
         ? {
             ...requirement,
-            typePiece:
-              include.typeMachinePieceRequirement.include?.typePiece
-                ? this.typePieces.find(
-                    (item) => item.id === requirement.typePieceId,
-                  ) ?? null
-                : undefined,
+            typePiece: include.typeMachinePieceRequirement.include?.typePiece
+              ? (this.typePieces.find(
+                  (item) => item.id === requirement.typePieceId,
+                ) ?? null)
+              : undefined,
           }
         : null;
     }
@@ -1505,8 +1705,8 @@ class InMemoryPrismaService {
       );
     }
 
-    if (include?.constructeur) {
-      base.constructeur = null;
+    if (include?.constructeurs) {
+      base.constructeurs = this.mapConstructeurs(component.constructeurIds);
     }
 
     if (include?.pieces) {
@@ -1536,8 +1736,8 @@ class InMemoryPrismaService {
       );
     }
 
-    if (include?.constructeur) {
-      base.constructeur = null;
+    if (include?.constructeurs) {
+      base.constructeurs = this.mapConstructeurs(piece.constructeurIds);
     }
 
     if (include?.typeMachinePieceRequirement) {