diff --git a/prisma/migrations/20250727205931_init/migration.sql b/prisma/migrations/20250727205931_init/migration.sql
new file mode 100644
index 0000000..57c3677
--- /dev/null
+++ b/prisma/migrations/20250727205931_init/migration.sql
@@ -0,0 +1,208 @@
+-- CreateTable
+CREATE TABLE "sites" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "sites_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "type_machines" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "category" TEXT,
+    "maintenanceFrequency" TEXT,
+    "components" JSONB,
+    "criticalParts" JSONB,
+    "specifications" JSONB,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "type_machines_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "type_composants" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "type_composants_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "type_pieces" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "type_pieces_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "machines" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "reference" TEXT,
+    "prestataire" TEXT,
+    "prix" DECIMAL(10,2),
+    "emplacement" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "siteId" TEXT NOT NULL,
+    "typeMachineId" TEXT,
+
+    CONSTRAINT "machines_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "composants" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "reference" TEXT,
+    "prestataire" TEXT,
+    "prix" DECIMAL(10,2),
+    "emplacement" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "machineId" TEXT,
+    "parentComposantId" TEXT,
+    "typeComposantId" TEXT,
+
+    CONSTRAINT "composants_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "pieces" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "reference" TEXT,
+    "prestataire" TEXT,
+    "prix" DECIMAL(10,2),
+    "emplacement" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "machineId" TEXT,
+    "composantId" TEXT,
+    "typePieceId" TEXT,
+
+    CONSTRAINT "pieces_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "documents" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "filename" TEXT NOT NULL,
+    "path" TEXT NOT NULL,
+    "mimeType" TEXT NOT NULL,
+    "size" INTEGER NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "machineId" TEXT,
+    "composantId" TEXT,
+    "pieceId" TEXT,
+
+    CONSTRAINT "documents_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "custom_fields" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "type" TEXT NOT NULL,
+    "required" BOOLEAN NOT NULL DEFAULT false,
+    "defaultValue" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "typeMachineId" TEXT,
+    "typeComposantId" TEXT,
+    "typePieceId" TEXT,
+
+    CONSTRAINT "custom_fields_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "custom_field_values" (
+    "id" TEXT NOT NULL,
+    "value" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "customFieldId" TEXT NOT NULL,
+    "machineId" TEXT,
+    "composantId" TEXT,
+    "pieceId" TEXT,
+
+    CONSTRAINT "custom_field_values_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "type_machines_name_key" ON "type_machines"("name");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "type_composants_name_key" ON "type_composants"("name");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "type_pieces_name_key" ON "type_pieces"("name");
+
+-- AddForeignKey
+ALTER TABLE "machines" ADD CONSTRAINT "machines_siteId_fkey" FOREIGN KEY ("siteId") REFERENCES "sites"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "machines" ADD CONSTRAINT "machines_typeMachineId_fkey" FOREIGN KEY ("typeMachineId") REFERENCES "type_machines"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "composants" ADD CONSTRAINT "composants_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "composants" ADD CONSTRAINT "composants_parentComposantId_fkey" FOREIGN KEY ("parentComposantId") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "composants" ADD CONSTRAINT "composants_typeComposantId_fkey" FOREIGN KEY ("typeComposantId") REFERENCES "type_composants"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "pieces" ADD CONSTRAINT "pieces_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "pieces" ADD CONSTRAINT "pieces_composantId_fkey" FOREIGN KEY ("composantId") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "pieces" ADD CONSTRAINT "pieces_typePieceId_fkey" FOREIGN KEY ("typePieceId") REFERENCES "type_pieces"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "documents" ADD CONSTRAINT "documents_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "documents" ADD CONSTRAINT "documents_composantId_fkey" FOREIGN KEY ("composantId") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "documents" ADD CONSTRAINT "documents_pieceId_fkey" FOREIGN KEY ("pieceId") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_fields" ADD CONSTRAINT "custom_fields_typeMachineId_fkey" FOREIGN KEY ("typeMachineId") REFERENCES "type_machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_fields" ADD CONSTRAINT "custom_fields_typeComposantId_fkey" FOREIGN KEY ("typeComposantId") REFERENCES "type_composants"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_fields" ADD CONSTRAINT "custom_fields_typePieceId_fkey" FOREIGN KEY ("typePieceId") REFERENCES "type_pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_field_values" ADD CONSTRAINT "custom_field_values_customFieldId_fkey" FOREIGN KEY ("customFieldId") REFERENCES "custom_fields"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_field_values" ADD CONSTRAINT "custom_field_values_machineId_fkey" FOREIGN KEY ("machineId") REFERENCES "machines"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_field_values" ADD CONSTRAINT "custom_field_values_composantId_fkey" FOREIGN KEY ("composantId") REFERENCES "composants"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "custom_field_values" ADD CONSTRAINT "custom_field_values_pieceId_fkey" FOREIGN KEY ("pieceId") REFERENCES "pieces"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/migrations/20250727211132_add_machine_pieces_to_type_machine/migration.sql b/prisma/migrations/20250727211132_add_machine_pieces_to_type_machine/migration.sql
new file mode 100644
index 0000000..893d6e1
--- /dev/null
+++ b/prisma/migrations/20250727211132_add_machine_pieces_to_type_machine/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "type_machines" ADD COLUMN     "machinePieces" JSONB;
diff --git a/prisma/migrations/20250728150553_add_options_to_custom_fields/migration.sql b/prisma/migrations/20250728150553_add_options_to_custom_fields/migration.sql
new file mode 100644
index 0000000..5b02efe
--- /dev/null
+++ b/prisma/migrations/20250728150553_add_options_to_custom_fields/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "custom_fields" ADD COLUMN     "options" TEXT[];
diff --git a/prisma/migrations/migration_lock.toml b/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..044d57c
--- /dev/null
+++ b/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
new file mode 100644
index 0000000..3d90e8d
--- /dev/null
+++ b/prisma/schema.prisma
@@ -0,0 +1,223 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+// Entités principales
+model Site {
+  id          String   @id @default(cuid())
+  name        String
+  description String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  machines Machine[]
+
+  @@map("sites")
+}
+
+model TypeMachine {
+  id          String   @id @default(cuid())
+  name        String   @unique
+  description String?
+  category    String?
+  maintenanceFrequency String?
+  components  Json?    // Stockage de la structure hiérarchique des composants
+  criticalParts Json?  // Stockage des pièces critiques
+  machinePieces Json?  // Stockage des pièces de machine
+  specifications Json? // Stockage des spécifications techniques
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  machines Machine[]
+  customFields CustomField[] @relation("TypeMachineCustomFields")
+
+  @@map("type_machines")
+}
+
+model TypeComposant {
+  id          String   @id @default(cuid())
+  name        String   @unique
+  description String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  composants Composant[]
+  customFields CustomField[] @relation("TypeComposantCustomFields")
+
+  @@map("type_composants")
+}
+
+model TypePiece {
+  id          String   @id @default(cuid())
+  name        String   @unique
+  description String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  pieces Piece[]
+  customFields CustomField[] @relation("TypePieceCustomFields")
+
+  @@map("type_pieces")
+}
+
+model Machine {
+  id          String   @id @default(cuid())
+  name        String
+  reference   String?
+  prestataire String?
+  prix        Decimal? @db.Decimal(10, 2)
+  emplacement String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  siteId      String
+  site        Site         @relation(fields: [siteId], references: [id], onDelete: Cascade)
+  
+  typeMachineId String?
+  typeMachine   TypeMachine? @relation(fields: [typeMachineId], references: [id])
+  
+  composants  Composant[]
+  pieces      Piece[]
+  documents   Document[]   @relation("MachineDocuments")
+  customFieldValues CustomFieldValue[] @relation("MachineCustomFieldValues")
+
+  @@map("machines")
+}
+
+model Composant {
+  id          String   @id @default(cuid())
+  name        String
+  reference   String?
+  prestataire String?
+  prix        Decimal? @db.Decimal(10, 2)
+  emplacement String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations hiérarchiques
+  machineId   String?
+  machine     Machine?    @relation(fields: [machineId], references: [id], onDelete: Cascade)
+  
+  parentComposantId String?
+  parentComposant   Composant? @relation("ComposantHierarchy", fields: [parentComposantId], references: [id], onDelete: Cascade)
+  sousComposants    Composant[] @relation("ComposantHierarchy")
+  
+  typeComposantId String?
+  typeComposant   TypeComposant? @relation(fields: [typeComposantId], references: [id])
+  
+  pieces      Piece[]
+  documents   Document[] @relation("ComposantDocuments")
+  customFieldValues CustomFieldValue[] @relation("ComposantCustomFieldValues")
+
+  @@map("composants")
+}
+
+model Piece {
+  id          String   @id @default(cuid())
+  name        String
+  reference   String?
+  prestataire String?
+  prix        Decimal? @db.Decimal(10, 2)
+  emplacement String?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  machineId   String?
+  machine     Machine?    @relation(fields: [machineId], references: [id], onDelete: Cascade)
+  
+  composantId String?
+  composant   Composant?  @relation(fields: [composantId], references: [id], onDelete: Cascade)
+  
+  typePieceId String?
+  typePiece   TypePiece?  @relation(fields: [typePieceId], references: [id])
+  
+  documents   Document[]  @relation("PieceDocuments")
+  customFieldValues CustomFieldValue[] @relation("PieceCustomFieldValues")
+
+  @@map("pieces")
+}
+
+model Document {
+  id          String   @id @default(cuid())
+  name        String
+  filename    String
+  path        String
+  mimeType    String
+  size        Int
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations polymorphiques
+  machineId   String?
+  machine     Machine?    @relation("MachineDocuments", fields: [machineId], references: [id], onDelete: Cascade)
+  
+  composantId String?
+  composant   Composant?  @relation("ComposantDocuments", fields: [composantId], references: [id], onDelete: Cascade)
+  
+  pieceId     String?
+  piece       Piece?      @relation("PieceDocuments", fields: [pieceId], references: [id], onDelete: Cascade)
+
+  @@map("documents")
+}
+
+model CustomField {
+  id          String   @id @default(cuid())
+  name        String
+  type        String   // 'string', 'number', 'boolean', 'date'
+  required    Boolean  @default(false)
+  defaultValue String?
+  options     String[] // Pour les champs de type SELECT
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations polymorphiques pour les types
+  typeMachineId   String?
+  typeMachine     TypeMachine?   @relation("TypeMachineCustomFields", fields: [typeMachineId], references: [id], onDelete: Cascade)
+  
+  typeComposantId String?
+  typeComposant   TypeComposant? @relation("TypeComposantCustomFields", fields: [typeComposantId], references: [id], onDelete: Cascade)
+  
+  typePieceId     String?
+  typePiece       TypePiece?     @relation("TypePieceCustomFields", fields: [typePieceId], references: [id], onDelete: Cascade)
+
+  // Relations avec les valeurs
+  customFieldValues CustomFieldValue[]
+
+  @@map("custom_fields")
+}
+
+model CustomFieldValue {
+  id          String   @id @default(cuid())
+  value       String
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  customFieldId String
+  customField   CustomField @relation(fields: [customFieldId], references: [id], onDelete: Cascade)
+  
+  machineId   String?
+  machine     Machine?    @relation("MachineCustomFieldValues", fields: [machineId], references: [id], onDelete: Cascade)
+  
+  composantId String?
+  composant   Composant?  @relation("ComposantCustomFieldValues", fields: [composantId], references: [id], onDelete: Cascade)
+  
+  pieceId     String?
+  piece       Piece?      @relation("PieceCustomFieldValues", fields: [pieceId], references: [id], onDelete: Cascade)
+
+  @@map("custom_field_values")
+}