chore(release) : v1.9.40

- Migration FK CASCADE/SET NULL pour toutes les FK vers pieces.id (miroir
  de la fix Composant) + cleanup des orphelins existants avec audit log
- Helper ensurePieceExists() qui catch EntityNotFoundException dans
  MachineStructureController et CustomFieldValueController
- Script SQL standalone scripts/cleanup_orphan_piece_refs.sql pour
  nettoyer la prod sans attendre la migration
- Affiche les machines (avec leur site) utilisant la pièce avant la
  confirmation de suppression

config/packages/api_platform.yaml

@@ -1,7 +1,7 @@
 api_platform:
     title: Inventory API
     description: API de gestion d'inventaire industriel — machines, pièces, composants, produits.
-    version: 1.9.6
+    version: 1.9.40
     defaults:
         stateless: false
         cache_headers:

config/version.yaml

@@ -1,2 +1,2 @@
 parameters:
-    app.version: '1.9.37'
+    app.version: '1.9.40'

frontend/app/components/home/AddMachineModal.vue

@@ -5,6 +5,19 @@
         Ajouter une nouvelle machine
       </h3>
       <form @submit.prevent="handleSubmit">
+        <div v-if="errorMessage" class="alert alert-error mb-4" role="alert">
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            class="h-5 w-5 shrink-0"
+            fill="none"
+            viewBox="0 0 24 24"
+            stroke="currentColor"
+          >
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z" />
+          </svg>
+          <span>{{ errorMessage }}</span>
+        </div>
+
         <div class="grid grid-cols-1 md:grid-cols-2 gap-4 mb-4">
           <div class="form-control">
             <label class="label">
@@ -78,6 +91,7 @@ const props = defineProps<{
   sites: Array<{ id: string, name: string }>
   disabled: boolean
   preselectedSiteId?: string
+  errorMessage?: string | null
 }>()
 
 const emit = defineEmits<{

frontend/app/composables/useMachineCreatePage.ts

@@ -8,7 +8,6 @@
 import { ref, reactive, onMounted } from 'vue'
 import { useMachines } from '~/composables/useMachines'
 import { useSites } from '~/composables/useSites'
-import { useToast } from '~/composables/useToast'
 import { humanizeError } from '~/shared/utils/errorMessages'
 
 export function useMachineCreatePage() {
@@ -18,7 +17,6 @@ export function useMachineCreatePage() {
 
   const { machines, loadMachines, createMachine, cloneMachine } = useMachines()
   const { sites, loadSites } = useSites()
-  const toast = useToast()
 
   // ---------------------------------------------------------------------------
   // Local state
@@ -27,6 +25,9 @@ export function useMachineCreatePage() {
   const submitting = ref(false)
   const loading = ref(true)
 
+  /** Persistent error shown inline in the form (e.g. duplicate name on the same site). */
+  const createError = ref<string | null>(null)
+
   const newMachine = reactive({
     name: '',
     siteId: '',
@@ -41,8 +42,10 @@ export function useMachineCreatePage() {
   const finalizeMachineCreation = async () => {
     if (submitting.value) return
 
+    createError.value = null
+
     if (!newMachine.name?.trim()) {
-      toast.showError('Merci de renseigner un nom pour la machine')
+      createError.value = 'Merci de renseigner un nom pour la machine.'
       return
     }
 
@@ -80,10 +83,10 @@ export function useMachineCreatePage() {
           await navigateTo('/machines')
         }
       } else if (result.error) {
-        toast.showError(`Impossible de créer la machine : ${humanizeError(result.error)}`)
+        createError.value = humanizeError(result.error)
       }
     } catch (error: any) {
-      toast.showError(`Impossible de créer la machine : ${humanizeError(error.message)}`)
+      createError.value = humanizeError(error.message)
     } finally {
       submitting.value = false
     }
@@ -116,6 +119,7 @@ export function useMachineCreatePage() {
     machines,
     submitting,
     loading,
+    createError,
 
     // Actions
     finalizeMachineCreation,

frontend/app/pages/catalogues/pieces.vue

@@ -167,7 +167,7 @@ import { usePieces } from '~/composables/usePieces'
 import { usePieceTypes } from '~/composables/usePieceTypes'
 import { useDataTable } from '~/composables/useDataTable'
 import DocumentThumbnail from '~/components/DocumentThumbnail.vue'
-import { resolveDeleteImpact, buildDeleteMessage } from '~/shared/utils/deleteImpactUtils'
+import { buildDeleteMessageWithUsage, type UsageInfo } from '~/shared/utils/deleteImpactUtils'
 import { resolvePrimaryDocument, resolvePreviewAlt, resolveSupplierNames, buildSuppliersDisplay } from '~/shared/utils/catalogDisplayUtils'
 import { formatFrenchDate } from '~/utils/date'
 
@@ -249,10 +249,25 @@ const buildPieceSuppliersDisplay = (piece: Record<string, any>) =>
   buildSuppliersDisplay(resolveSupplierNames(piece, 'product'))
 
 const { confirm } = useConfirm()
+const api = useApi()
 
 const handleDeletePiece = async (piece: Record<string, any>) => {
   const pieceName = piece?.name || 'cette pièce'
-  const message = buildDeleteMessage(pieceName, resolveDeleteImpact(piece))
+
+  let usage: UsageInfo = {}
+  try {
+    const result = await api.get(`/pieces/${piece.id}/used-in`)
+    if (result.success && result.data) {
+      usage = {
+        machines: result.data.machines ?? [],
+        composants: result.data.composants ?? [],
+      }
+    }
+  } catch (error) {
+    console.warn('Impossible de récupérer les usages de la pièce avant suppression :', error)
+  }
+
+  const message = buildDeleteMessageWithUsage(pieceName, 'Cette pièce', usage)
   const confirmed = await confirm({ title: 'Supprimer la pièce', message, dangerous: true })
   if (!confirmed) return
   await deletePiece(piece.id)

frontend/app/pages/index.vue

@@ -58,7 +58,26 @@
                 </option>
               </select>
             </div>
-            <div class="form-control">
+            <div class="form-control md:w-52">
+              <label class="label">
+                <span class="label-text text-xs font-semibold uppercase tracking-wide text-base-content/50">Trier par</span>
+              </label>
+              <select v-model="sortOrder" class="select select-bordered w-full">
+                <option value="name-asc">
+                  Nom (A → Z)
+                </option>
+                <option value="name-desc">
+                  Nom (Z → A)
+                </option>
+                <option value="date-desc">
+                  Plus récentes
+                </option>
+                <option value="date-asc">
+                  Plus anciennes
+                </option>
+              </select>
+            </div>
+            <div class="form-control md:w-80">
               <label class="label">
                 <span class="label-text text-xs font-semibold uppercase tracking-wide text-base-content/50">Date de création</span>
               </label>
@@ -66,13 +85,13 @@
                 <input
                   v-model="dateFrom"
                   type="date"
-                  class="input input-bordered input-sm"
+                  class="input input-bordered w-full"
                 >
                 <span class="text-xs text-base-content/50">à</span>
                 <input
                   v-model="dateTo"
                   type="date"
-                  class="input input-bordered input-sm"
+                  class="input input-bordered w-full"
                 >
               </div>
             </div>
@@ -97,7 +116,7 @@
           <button class="btn btn-primary btn-sm" @click="showAddSiteModal = true">
             Ajouter un site
           </button>
-          <button class="btn btn-ghost btn-sm" @click="showAddMachineModal = true">
+          <button class="btn btn-ghost btn-sm" @click="openAddMachineModal">
             Ajouter une machine
           </button>
         </div>
@@ -263,7 +282,8 @@
       :sites="sites"
       :disabled="!canEdit"
       :preselected-site-id="preselectedSiteId"
-      @close="showAddMachineModal = false"
+      :error-message="addMachineError"
+      @close="closeAddMachineModal"
       @create="handleCreateMachine"
     />
   </main>
@@ -293,8 +313,10 @@ const { machines, loadMachines, createMachine, deleteMachine } = useMachines()
 // Data
 const showAddSiteModal = ref(false)
 const showAddMachineModal = ref(false)
+const addMachineError = ref(null)
 const searchTerm = ref('')
 const selectedSiteFilter = ref('')
+const sortOrder = ref('name-asc')
 const dateFrom = ref('')
 const dateTo = ref('')
 const collapsedSites = ref([])
@@ -318,10 +340,33 @@ const machinesBySiteId = computed(() => {
   return map
 })
 
+const sortMachines = (machineList) => {
+  const list = [...machineList]
+  switch (sortOrder.value) {
+    case 'name-desc':
+      return list.sort((a, b) =>
+        (b.name || '').localeCompare(a.name || '', 'fr', { sensitivity: 'base', numeric: true })
+      )
+    case 'date-desc':
+      return list.sort((a, b) =>
+        new Date(b.createdAt || 0) - new Date(a.createdAt || 0)
+      )
+    case 'date-asc':
+      return list.sort((a, b) =>
+        new Date(a.createdAt || 0) - new Date(b.createdAt || 0)
+      )
+    case 'name-asc':
+    default:
+      return list.sort((a, b) =>
+        (a.name || '').localeCompare(b.name || '', 'fr', { sensitivity: 'base', numeric: true })
+      )
+  }
+}
+
 const sitesWithMachines = computed(() => {
   return sites.value.map((site) => ({
     ...site,
-    machines: machinesBySiteId.value.get(site.id) || []
+    machines: sortMachines(machinesBySiteId.value.get(site.id) || [])
   }))
 })
 
@@ -406,11 +451,14 @@ const handleCreateSite = async (data) => {
 }
 
 const handleCreateMachine = async (data) => {
+  addMachineError.value = null
   const result = await createMachine(data)
 
   if (result.success) {
     showAddMachineModal.value = false
     await loadMachines()
+  } else if (result.error) {
+    addMachineError.value = humanizeError(result.error)
   }
 }
 
@@ -455,9 +503,19 @@ const confirmDeleteMachine = async (machine) => {
   }
 }
 
+const openAddMachineModal = () => {
+  addMachineError.value = null
+  showAddMachineModal.value = true
+}
+
+const closeAddMachineModal = () => {
+  addMachineError.value = null
+  showAddMachineModal.value = false
+}
+
 const addMachineToSite = (site) => {
   preselectedSiteId.value = site.id
-  showAddMachineModal.value = true
+  openAddMachineModal()
 }
 
 // Lifecycle

frontend/app/pages/machines/new.vue

@@ -20,6 +20,19 @@
       </div>
 
       <form v-else class="space-y-6" @submit.prevent="c.finalizeMachineCreation">
+        <div v-if="c.createError" class="alert alert-error" role="alert">
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            class="h-5 w-5 shrink-0"
+            fill="none"
+            viewBox="0 0 24 24"
+            stroke="currentColor"
+          >
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z" />
+          </svg>
+          <span>{{ c.createError }}</span>
+        </div>
+
         <div class="card bg-base-100 shadow-sm">
           <div class="card-body space-y-6">
             <!-- Basic fields -->

frontend/app/shared/utils/deleteImpactUtils.ts

@@ -14,6 +14,77 @@ export const buildDeleteMessage = (entityName: string, impacts: string[]): strin
   if (impacts.length) {
     lines.push(`Cela supprimera également :\n• ${impacts.join('\n• ')}`)
   }
+  lines.push('Cette action est irréversible.')
+  return lines.join('\n\n')
+}
+
+interface UsedInMachine {
+  id: string
+  name: string | null
+  site?: { id: string; name: string | null } | null
+}
+
+interface UsedInEntity {
+  id: string
+  name: string | null
+}
+
+export interface UsageInfo {
+  machines?: UsedInMachine[]
+  composants?: UsedInEntity[]
+  pieces?: UsedInEntity[]
+}
+
+const formatMachineLine = (m: UsedInMachine): string => {
+  const name = m.name?.trim() || '(sans nom)'
+  const siteName = m.site?.name?.trim()
+  return siteName ? `${name} (${siteName})` : name
+}
+
+/**
+ * Builds a delete-confirmation message that lists the machines (and other
+ * entities) currently using the item. The user sees exactly what will be
+ * detached before they confirm the deletion.
+ */
+export const buildDeleteMessageWithUsage = (
+  entityName: string,
+  entityLabel: string,
+  usage: UsageInfo,
+): string => {
+  const machines = usage.machines ?? []
+  const composants = usage.composants ?? []
+  const pieces = usage.pieces ?? []
+
+  const lines = [`Voulez-vous vraiment supprimer « ${entityName} » ?`]
+
+  if (machines.length > 0) {
+    const header = machines.length === 1
+      ? `${entityLabel} est actuellement utilisée par 1 machine :`
+      : `${entityLabel} est actuellement utilisée par ${machines.length} machines :`
+    const bullets = machines.map((m) => `• ${formatMachineLine(m)}`).join('\n')
+    lines.push(`${header}\n${bullets}\n\nLa supprimer la retirera de ${machines.length === 1 ? 'cette machine' : 'ces machines'}.`)
+  }
+
+  if (composants.length > 0) {
+    const header = composants.length === 1
+      ? 'Elle est également référencée par 1 composant :'
+      : `Elle est également référencée par ${composants.length} composants :`
+    const bullets = composants
+      .map((c) => `• ${c.name?.trim() || '(sans nom)'}`)
+      .join('\n')
+    lines.push(`${header}\n${bullets}`)
+  }
+
+  if (pieces.length > 0) {
+    const header = pieces.length === 1
+      ? 'Elle est également utilisée par 1 pièce :'
+      : `Elle est également utilisée par ${pieces.length} pièces :`
+    const bullets = pieces
+      .map((p) => `• ${p.name?.trim() || '(sans nom)'}`)
+      .join('\n')
+    lines.push(`${header}\n${bullets}`)
+  }
+
   lines.push('Cette action est irréversible.')
   return lines.join('\n\n')
 }

migrations/Version20260527140000.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260527140000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Machine name uniqueness is now scoped per site: drop global unique index on machines(name), add composite unique index on (name, siteid)';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // Drop the global unique index/constraint on machines(name).
+        // Doctrine-generated name (CRC32 of table+column): uniq_f1ce8ded5e237e06.
+        // It may exist either as a constraint or as a bare index depending on origin,
+        // so we drop defensively in both forms.
+        $this->addSql('ALTER TABLE machines DROP CONSTRAINT IF EXISTS uniq_f1ce8ded5e237e06');
+        $this->addSql('DROP INDEX IF EXISTS uniq_f1ce8ded5e237e06');
+        // Defensive fallbacks for other possible legacy names of the global unique index on name.
+        $this->addSql('ALTER TABLE machines DROP CONSTRAINT IF EXISTS machines_name_key');
+        $this->addSql('DROP INDEX IF EXISTS machines_name_key');
+
+        // New uniqueness scope: a machine name is unique within a given site only.
+        $this->addSql('CREATE UNIQUE INDEX IF NOT EXISTS uniq_machine_name_site ON machines (name, siteid)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP INDEX IF EXISTS uniq_machine_name_site');
+
+        // Best-effort restore of the global unique index on machines(name).
+        // WARNING: this will fail if duplicate names now exist across sites (which the
+        // per-site scope allowed). Resolve duplicates manually before rolling back.
+        $this->addSql('CREATE UNIQUE INDEX IF NOT EXISTS uniq_f1ce8ded5e237e06 ON machines (name)');
+    }
+}

migrations/Version20260528090000_FixPieceCascadeFKs.php

@@ -0,0 +1,250 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Align all FKs pointing to `pieces.id` with what entities declare
+ * (ON DELETE CASCADE / SET NULL). Cleans up pre-existing orphan rows
+ * inserted before the constraints existed, so the new FKs can be added.
+ *
+ * Mirror of Version20260506140000_FixComposantCascadeFKs for the Piece side.
+ */
+final class Version20260528090000_FixPieceCascadeFKs extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Align CASCADE/SET NULL FKs on pieces references (machine_piece_links, composant_piece_slots, piece_product_slots, documents, custom_field_values, piece_constructeur_links); cleanup pre-existing orphans';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // =========================================================================
+        // 1. Audit log : snapshot des rows orphelines avant suppression.
+        // =========================================================================
+        $this->addSql(<<<'SQL'
+            INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+            SELECT
+              'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+              'machine_piece_link',
+              l.id,
+              'delete',
+              json_build_object(
+                'id', l.id,
+                'machineId', l.machineid,
+                'pieceId', l.pieceid,
+                'note', 'Cleaned by FK cascade fix migration (Version20260528090000) - referenced piece no longer existed'
+              ),
+              NULL,
+              NOW()
+            FROM machine_piece_links l
+            WHERE l.pieceid IS NOT NULL
+              AND l.pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+            SELECT
+              'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+              'piece_product_slot',
+              s.id,
+              'delete',
+              json_build_object(
+                'id', s.id,
+                'pieceId', s.pieceid,
+                'note', 'Cleaned by FK cascade fix migration (Version20260528090000) - referenced piece no longer existed'
+              ),
+              NULL,
+              NOW()
+            FROM piece_product_slots s
+            WHERE s.pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+            SELECT
+              'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+              'document',
+              d.id,
+              'delete',
+              json_build_object(
+                'id', d.id,
+                'name', d.name,
+                'filename', d.filename,
+                'pieceId', d.pieceid,
+                'note', 'Cleaned by FK cascade fix migration (Version20260528090000) - referenced piece no longer existed'
+              ),
+              NULL,
+              NOW()
+            FROM documents d
+            WHERE d.pieceid IS NOT NULL
+              AND d.pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+            SELECT
+              'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+              'custom_field_value',
+              v.id,
+              'delete',
+              json_build_object(
+                'id', v.id,
+                'pieceId', v.pieceid,
+                'note', 'Cleaned by FK cascade fix migration (Version20260528090000) - referenced piece no longer existed'
+              ),
+              NULL,
+              NOW()
+            FROM custom_field_values v
+            WHERE v.pieceid IS NOT NULL
+              AND v.pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+            SELECT
+              'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+              'piece_constructeur_link',
+              l.id,
+              'delete',
+              json_build_object(
+                'id', l.id,
+                'pieceId', l.pieceid,
+                'constructeurId', l.constructeurid,
+                'note', 'Cleaned by FK cascade fix migration (Version20260528090000) - referenced piece no longer existed'
+              ),
+              NULL,
+              NOW()
+            FROM piece_constructeur_links l
+            WHERE l.pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        // =========================================================================
+        // 2. Nettoyage des orphelins (avant ADD CONSTRAINT, sinon PG rejette).
+        // =========================================================================
+        $this->addSql(<<<'SQL'
+            DELETE FROM machine_piece_links
+            WHERE pieceid IS NOT NULL
+              AND pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            UPDATE composant_piece_slots SET selectedpieceid = NULL
+            WHERE selectedpieceid IS NOT NULL
+              AND selectedpieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            DELETE FROM piece_product_slots
+            WHERE pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            DELETE FROM documents
+            WHERE pieceid IS NOT NULL
+              AND pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            DELETE FROM custom_field_values
+            WHERE pieceid IS NOT NULL
+              AND pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            DELETE FROM piece_constructeur_links
+            WHERE pieceid NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        $this->addSql(<<<'SQL'
+            DELETE FROM piece_products
+            WHERE piece_id NOT IN (SELECT id FROM pieces)
+            SQL);
+
+        // =========================================================================
+        // 3. Drop des éventuelles FK existantes vers `pieces` (quel que soit leur
+        //    nom historique), puis ADD CONSTRAINT avec le bon ON DELETE.
+        // =========================================================================
+        $this->dropFksReferencingPieces('machine_piece_links', 'pieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE machine_piece_links ADD CONSTRAINT fk_mpl_piece
+              FOREIGN KEY (pieceid) REFERENCES pieces(id) ON DELETE CASCADE
+            SQL);
+
+        $this->dropFksReferencingPieces('composant_piece_slots', 'selectedpieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE composant_piece_slots ADD CONSTRAINT fk_cps_selected_piece
+              FOREIGN KEY (selectedpieceid) REFERENCES pieces(id) ON DELETE SET NULL
+            SQL);
+
+        $this->dropFksReferencingPieces('piece_product_slots', 'pieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE piece_product_slots ADD CONSTRAINT fk_pps_piece
+              FOREIGN KEY (pieceid) REFERENCES pieces(id) ON DELETE CASCADE
+            SQL);
+
+        $this->dropFksReferencingPieces('documents', 'pieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE documents ADD CONSTRAINT fk_documents_piece
+              FOREIGN KEY (pieceid) REFERENCES pieces(id) ON DELETE CASCADE
+            SQL);
+
+        $this->dropFksReferencingPieces('custom_field_values', 'pieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE custom_field_values ADD CONSTRAINT fk_cfv_piece
+              FOREIGN KEY (pieceid) REFERENCES pieces(id) ON DELETE CASCADE
+            SQL);
+
+        $this->dropFksReferencingPieces('piece_constructeur_links', 'pieceid');
+        $this->addSql(<<<'SQL'
+            ALTER TABLE piece_constructeur_links ADD CONSTRAINT fk_pcl_piece
+              FOREIGN KEY (pieceid) REFERENCES pieces(id) ON DELETE CASCADE
+            SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE machine_piece_links      DROP CONSTRAINT IF EXISTS fk_mpl_piece');
+        $this->addSql('ALTER TABLE composant_piece_slots    DROP CONSTRAINT IF EXISTS fk_cps_selected_piece');
+        $this->addSql('ALTER TABLE piece_product_slots      DROP CONSTRAINT IF EXISTS fk_pps_piece');
+        $this->addSql('ALTER TABLE documents                DROP CONSTRAINT IF EXISTS fk_documents_piece');
+        $this->addSql('ALTER TABLE custom_field_values      DROP CONSTRAINT IF EXISTS fk_cfv_piece');
+        $this->addSql('ALTER TABLE piece_constructeur_links DROP CONSTRAINT IF EXISTS fk_pcl_piece');
+    }
+
+    /**
+     * Drop every FK on $table.$column that references the `pieces` table,
+     * regardless of its historic name. Idempotent.
+     */
+    private function dropFksReferencingPieces(string $table, string $column): void
+    {
+        $sql = <<<SQL
+            DO \$\$
+            DECLARE
+              fk_name TEXT;
+            BEGIN
+              FOR fk_name IN
+                SELECT tc.constraint_name
+                FROM information_schema.table_constraints tc
+                JOIN information_schema.key_column_usage kcu
+                  ON kcu.constraint_name = tc.constraint_name
+                 AND kcu.table_schema    = tc.table_schema
+                JOIN information_schema.constraint_column_usage ccu
+                  ON ccu.constraint_name = tc.constraint_name
+                 AND ccu.table_schema    = tc.table_schema
+                WHERE tc.table_name      = '{$table}'
+                  AND tc.constraint_type = 'FOREIGN KEY'
+                  AND kcu.column_name    = '{$column}'
+                  AND ccu.table_name     = 'pieces'
+              LOOP
+                EXECUTE format('ALTER TABLE {$table} DROP CONSTRAINT %I', fk_name);
+              END LOOP;
+            END \$\$;
+            SQL;
+        $this->addSql($sql);
+    }
+}

scripts/cleanup_orphan_piece_refs.sql

@@ -0,0 +1,223 @@
+-- =============================================================================
+-- cleanup_orphan_piece_refs.sql
+-- =============================================================================
+-- Contexte : la suppression directe de rows dans `pieces` (bypass Doctrine /
+-- FK DB sans ON DELETE CASCADE) laisse des références orphelines dans plusieurs
+-- tables, ce qui fait planter l'API au chargement d'une Machine :
+--   Doctrine\ORM\EntityNotFoundException: Entity of type 'App\Entity\Piece' ...
+--
+-- Ce script fait deux choses :
+--   1. ÉTAPE 1 (toujours exécutée) : compte les références orphelines par table
+--      pour visualiser l'ampleur du problème.
+--   2. ÉTAPE 2 (commentée par défaut) : insère un audit_log par row, puis
+--      DELETE / UPDATE SET NULL selon la sémantique attendue côté entité.
+--      Décommenter le bloc `BEGIN; ... COMMIT;` pour appliquer.
+--
+-- Usage :
+--   # Dry-run (compte seulement)
+--   psql -h <host> -U <user> -d inventory -f scripts/cleanup_orphan_piece_refs.sql
+--
+--   # Application : décommenter le bloc transactionnel en bas du fichier,
+--   # puis relancer la même commande. La transaction garantit l'atomicité.
+-- =============================================================================
+
+
+-- ============================== ÉTAPE 1 : DRY-RUN ============================
+\echo ''
+\echo '=== Orphelins par table (Pieces) ==='
+
+SELECT 'machine_piece_links'      AS table_name, count(*) AS orphans
+  FROM machine_piece_links
+  WHERE pieceid IS NOT NULL
+    AND pieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'composant_piece_slots',     count(*)
+  FROM composant_piece_slots
+  WHERE selectedpieceid IS NOT NULL
+    AND selectedpieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'piece_product_slots',       count(*)
+  FROM piece_product_slots
+  WHERE pieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'documents',                 count(*)
+  FROM documents
+  WHERE pieceid IS NOT NULL
+    AND pieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'custom_field_values',       count(*)
+  FROM custom_field_values
+  WHERE pieceid IS NOT NULL
+    AND pieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'piece_constructeur_links',  count(*)
+  FROM piece_constructeur_links
+  WHERE pieceid NOT IN (SELECT id FROM pieces)
+UNION ALL
+SELECT 'piece_products',            count(*)
+  FROM piece_products
+  WHERE piece_id NOT IN (SELECT id FROM pieces)
+ORDER BY table_name;
+
+\echo ''
+\echo '=> Pour appliquer le cleanup, décommenter le bloc BEGIN/COMMIT ci-dessous.'
+\echo ''
+
+
+-- ============================== ÉTAPE 2 : APPLY =============================
+-- Décommenter ce bloc pour exécuter le cleanup. La transaction garantit
+-- l'atomicité : tout passe, ou rien (en cas d'erreur, ROLLBACK auto).
+--
+-- BEGIN;
+--
+-- -- 1. Audit log : snapshot des rows qui vont être supprimées (traçabilité prod).
+--
+-- INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+-- SELECT
+--   'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+--   'machine_piece_link',
+--   l.id,
+--   'delete',
+--   json_build_object(
+--     'id', l.id,
+--     'machineId', l.machineid,
+--     'pieceId', l.pieceid,
+--     'note', 'Cleaned by cleanup_orphan_piece_refs.sql - referenced piece no longer existed'
+--   ),
+--   NULL,
+--   NOW()
+-- FROM machine_piece_links l
+-- WHERE l.pieceid IS NOT NULL
+--   AND l.pieceid NOT IN (SELECT id FROM pieces);
+--
+-- INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+-- SELECT
+--   'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+--   'piece_product_slot',
+--   s.id,
+--   'delete',
+--   json_build_object(
+--     'id', s.id,
+--     'pieceId', s.pieceid,
+--     'note', 'Cleaned by cleanup_orphan_piece_refs.sql - referenced piece no longer existed'
+--   ),
+--   NULL,
+--   NOW()
+-- FROM piece_product_slots s
+-- WHERE s.pieceid NOT IN (SELECT id FROM pieces);
+--
+-- INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+-- SELECT
+--   'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+--   'document',
+--   d.id,
+--   'delete',
+--   json_build_object(
+--     'id', d.id,
+--     'name', d.name,
+--     'filename', d.filename,
+--     'pieceId', d.pieceid,
+--     'note', 'Cleaned by cleanup_orphan_piece_refs.sql - referenced piece no longer existed'
+--   ),
+--   NULL,
+--   NOW()
+-- FROM documents d
+-- WHERE d.pieceid IS NOT NULL
+--   AND d.pieceid NOT IN (SELECT id FROM pieces);
+--
+-- INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+-- SELECT
+--   'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+--   'custom_field_value',
+--   v.id,
+--   'delete',
+--   json_build_object(
+--     'id', v.id,
+--     'pieceId', v.pieceid,
+--     'note', 'Cleaned by cleanup_orphan_piece_refs.sql - referenced piece no longer existed'
+--   ),
+--   NULL,
+--   NOW()
+-- FROM custom_field_values v
+-- WHERE v.pieceid IS NOT NULL
+--   AND v.pieceid NOT IN (SELECT id FROM pieces);
+--
+-- INSERT INTO audit_logs (id, entitytype, entityid, action, snapshot, actorprofileid, createdat)
+-- SELECT
+--   'cl' || substring(md5(random()::text || clock_timestamp()::text), 1, 24),
+--   'piece_constructeur_link',
+--   l.id,
+--   'delete',
+--   json_build_object(
+--     'id', l.id,
+--     'pieceId', l.pieceid,
+--     'constructeurId', l.constructeurid,
+--     'note', 'Cleaned by cleanup_orphan_piece_refs.sql - referenced piece no longer existed'
+--   ),
+--   NULL,
+--   NOW()
+-- FROM piece_constructeur_links l
+-- WHERE l.pieceid NOT IN (SELECT id FROM pieces);
+--
+-- -- 2. Nettoyage des orphelins.
+--
+-- DELETE FROM machine_piece_links
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces);
+--
+-- UPDATE composant_piece_slots SET selectedpieceid = NULL
+--   WHERE selectedpieceid IS NOT NULL
+--     AND selectedpieceid NOT IN (SELECT id FROM pieces);
+--
+-- DELETE FROM piece_product_slots
+--   WHERE pieceid NOT IN (SELECT id FROM pieces);
+--
+-- DELETE FROM documents
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces);
+--
+-- DELETE FROM custom_field_values
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces);
+--
+-- DELETE FROM piece_constructeur_links
+--   WHERE pieceid NOT IN (SELECT id FROM pieces);
+--
+-- DELETE FROM piece_products
+--   WHERE piece_id NOT IN (SELECT id FROM pieces);
+--
+-- -- 3. Vérification post-cleanup : tout doit être à 0.
+-- SELECT 'machine_piece_links'      AS table_name, count(*) AS remaining_orphans
+--   FROM machine_piece_links
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'composant_piece_slots',     count(*)
+--   FROM composant_piece_slots
+--   WHERE selectedpieceid IS NOT NULL
+--     AND selectedpieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'piece_product_slots',       count(*)
+--   FROM piece_product_slots
+--   WHERE pieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'documents',                 count(*)
+--   FROM documents
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'custom_field_values',       count(*)
+--   FROM custom_field_values
+--   WHERE pieceid IS NOT NULL
+--     AND pieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'piece_constructeur_links',  count(*)
+--   FROM piece_constructeur_links
+--   WHERE pieceid NOT IN (SELECT id FROM pieces)
+-- UNION ALL
+-- SELECT 'piece_products',            count(*)
+--   FROM piece_products
+--   WHERE piece_id NOT IN (SELECT id FROM pieces)
+-- ORDER BY table_name;
+--
+-- COMMIT;

src/Controller/CustomFieldValueController.php

@@ -6,6 +6,7 @@ namespace App\Controller;
 
 use App\Entity\CustomField;
 use App\Entity\CustomFieldValue;
+use App\Entity\Piece;
 use App\Repository\ComposantRepository;
 use App\Repository\CustomFieldRepository;
 use App\Repository\CustomFieldValueRepository;
@@ -15,6 +16,7 @@ use App\Repository\MachineRepository;
 use App\Repository\PieceRepository;
 use App\Repository\ProductRepository;
 use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityNotFoundException;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
@@ -288,12 +290,31 @@ class CustomFieldValueController extends AbstractController
 
             case 'machinePieceLink':
                 $value->setMachinePieceLink($entity);
-                $value->setPiece($entity->getPiece());
+                $value->setPiece($this->ensurePieceExists($entity->getPiece()));
 
                 break;
         }
     }
 
+    /**
+     * Returns the Piece if its underlying row still exists in DB, otherwise null.
+     * Forces a lazy proxy to initialize via getId() and swallows EntityNotFoundException
+     * so an orphan link to a deleted piece doesn't crash custom-field value writes.
+     */
+    private function ensurePieceExists(?Piece $piece): ?Piece
+    {
+        if (null === $piece) {
+            return null;
+        }
+        try {
+            $piece->getId();
+
+            return $piece;
+        } catch (EntityNotFoundException) {
+            return null;
+        }
+    }
+
     private function normalizeCustomFieldValue(CustomFieldValue $value): array
     {
         $customField = $value->getCustomField();

src/Controller/MachineStructureController.php

@@ -26,6 +26,7 @@ use App\Repository\PieceRepository;
 use App\Repository\ProductRepository;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityNotFoundException;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
@@ -676,7 +677,7 @@ class MachineStructureController extends AbstractController
     private function normalizePieceLinks(array $links): array
     {
         return array_map(function (MachinePieceLink $link): array {
-            $piece      = $link->getPiece();
+            $piece      = $this->ensurePieceExists($link->getPiece());
             $modelType  = $link->getModelType();
             $parentLink = $link->getParentLink();
             $type       = $piece?->getTypePiece();
@@ -704,7 +705,7 @@ class MachineStructureController extends AbstractController
     private function resolvePieceQuantity(MachinePieceLink $link): int
     {
         $parentLink = $link->getParentLink();
-        $piece      = $link->getPiece();
+        $piece      = $this->ensurePieceExists($link->getPiece());
 
         if (!$parentLink || !$piece) {
             return $link->getQuantity();
@@ -716,7 +717,8 @@ class MachineStructureController extends AbstractController
         }
 
         foreach ($composant->getPieceSlots() as $slot) {
-            if ($slot->getSelectedPiece()?->getId() === $piece->getId()) {
+            $selected = $this->ensurePieceExists($slot->getSelectedPiece());
+            if ($selected?->getId() === $piece->getId()) {
                 return $slot->getQuantity();
             }
         }
@@ -771,15 +773,16 @@ class MachineStructureController extends AbstractController
     {
         $pieces = [];
         foreach ($composant->getPieceSlots() as $slot) {
+            $selectedPiece = $this->ensurePieceExists($slot->getSelectedPiece());
             $pieceData = [
                 'slotId'          => $slot->getId(),
                 'typePieceId'     => $slot->getTypePiece()?->getId(),
                 'typePiece'       => $this->normalizeModelType($slot->getTypePiece()),
                 'quantity'        => $slot->getQuantity(),
-                'selectedPieceId' => $slot->getSelectedPiece()?->getId(),
+                'selectedPieceId' => $selectedPiece?->getId(),
             ];
-            if ($slot->getSelectedPiece()) {
-                $pieceData['resolvedPiece'] = $this->normalizePiece($slot->getSelectedPiece());
+            if ($selectedPiece) {
+                $pieceData['resolvedPiece'] = $this->normalizePiece($selectedPiece);
             }
             $pieces[] = $pieceData;
         }
@@ -810,6 +813,25 @@ class MachineStructureController extends AbstractController
         ];
     }
 
+    /**
+     * Returns the Piece if its underlying row still exists in DB, otherwise null.
+     * Forces a lazy proxy to initialize via getId() and swallows EntityNotFoundException
+     * so a stale FK (orphan link to a deleted piece) doesn't crash the whole machine view.
+     */
+    private function ensurePieceExists(?Piece $piece): ?Piece
+    {
+        if (null === $piece) {
+            return null;
+        }
+        try {
+            $piece->getId();
+
+            return $piece;
+        } catch (EntityNotFoundException) {
+            return null;
+        }
+    }
+
     private function normalizePiece(Piece $piece): array
     {
         $type = $piece->getTypePiece();

src/Entity/Machine.php

@@ -24,8 +24,10 @@ use Symfony\Component\Validator\Constraints as Assert;
 
 #[ORM\Entity(repositoryClass: MachineRepository::class)]
 #[ORM\Table(name: 'machines')]
+#[ORM\UniqueConstraint(name: 'uniq_machine_name_site', columns: ['name', 'siteId'])]
 #[ORM\HasLifecycleCallbacks]
 #[UniqueEntity(fields: ['reference'], message: 'Une machine avec cette référence existe déjà.', ignoreNull: true)]
+#[UniqueEntity(fields: ['name', 'site'], message: 'Une machine avec ce nom existe déjà sur ce site.')]
 #[ApiResource(
     description: 'Machines industrielles rattachées à un site. Chaque machine possède une structure hiérarchique de composants, pièces et produits, ainsi que des champs personnalisés et des documents.',
     operations: [
@@ -45,7 +47,7 @@ class Machine
     #[Groups(['document:list'])]
     private ?string $id = null;
 
-    #[ORM\Column(type: Types::STRING, length: 255, unique: true)]
+    #[ORM\Column(type: Types::STRING, length: 255)]
     #[Groups(['document:list'])]
     private string $name;
 

src/EventSubscriber/UniqueConstraintSubscriber.php

@@ -30,8 +30,9 @@ final class UniqueConstraintSubscriber implements EventSubscriberInterface
 
         $constraint = $this->detectConstraintName($exception);
         $error      = match ($constraint) {
-            'unique_category_name' => 'Un élément avec ce nom existe déjà dans cette catégorie.',
-            default                => 'Un élément avec cette valeur existe déjà.',
+            'unique_category_name'   => 'Un élément avec ce nom existe déjà dans cette catégorie.',
+            'uniq_machine_name_site' => 'Une machine avec ce nom existe déjà sur ce site.',
+            default                  => 'Un élément avec cette valeur existe déjà.',
         };
 
         $event->setResponse(new JsonResponse(

tests/Api/Entity/MachineTest.php

@@ -134,6 +134,88 @@ class MachineTest extends AbstractApiTestCase
         $this->assertResponseStatusCodeSame(422);
     }
 
+    public function testSameNameOnDifferentSitesIsAllowed(): void
+    {
+        $siteA = $this->createSite('Usine A');
+        $siteB = $this->createSite('Usine B');
+        $this->createMachine('Pompe', $siteA);
+
+        $client = $this->createGestionnaireClient();
+        $client->request('POST', '/api/machines', [
+            'headers' => ['Content-Type' => 'application/ld+json'],
+            'json'    => [
+                'name' => 'Pompe',
+                'site' => self::iri('sites', $siteB->getId()),
+            ],
+        ]);
+
+        $this->assertResponseStatusCodeSame(201);
+        $this->assertJsonContains(['name' => 'Pompe']);
+    }
+
+    public function testSameNameOnSameSiteIsRejected(): void
+    {
+        $site = $this->createSite('Usine');
+        $this->createMachine('Pompe', $site);
+
+        $client = $this->createGestionnaireClient();
+        $client->request('POST', '/api/machines', [
+            'headers' => ['Content-Type' => 'application/ld+json'],
+            'json'    => [
+                'name' => 'Pompe',
+                'site' => self::iri('sites', $site->getId()),
+            ],
+        ]);
+
+        $this->assertResponseStatusCodeSame(422);
+        $this->assertJsonContains([
+            'violations' => [
+                ['message' => 'Une machine avec ce nom existe déjà sur ce site.'],
+            ],
+        ]);
+    }
+
+    public function testRenameToExistingNameOnSameSiteIsRejected(): void
+    {
+        $site = $this->createSite('Usine');
+        $this->createMachine('Pompe', $site);
+        $other = $this->createMachine('Moteur', $site);
+
+        $client = $this->createGestionnaireClient();
+        $client->request('PATCH', self::iri('machines', $other->getId()), [
+            'headers' => ['Content-Type' => 'application/merge-patch+json'],
+            'json'    => ['name' => 'Pompe'],
+        ]);
+
+        $this->assertResponseStatusCodeSame(422);
+        $this->assertJsonContains([
+            'violations' => [
+                ['message' => 'Une machine avec ce nom existe déjà sur ce site.'],
+            ],
+        ]);
+    }
+
+    public function testMoveToSiteWhereNameExistsIsRejected(): void
+    {
+        $siteA = $this->createSite('Usine A');
+        $siteB = $this->createSite('Usine B');
+        $this->createMachine('Pompe', $siteB);
+        $machine = $this->createMachine('Pompe', $siteA);
+
+        $client = $this->createGestionnaireClient();
+        $client->request('PATCH', self::iri('machines', $machine->getId()), [
+            'headers' => ['Content-Type' => 'application/merge-patch+json'],
+            'json'    => ['site' => self::iri('sites', $siteB->getId())],
+        ]);
+
+        $this->assertResponseStatusCodeSame(422);
+        $this->assertJsonContains([
+            'violations' => [
+                ['message' => 'Une machine avec ce nom existe déjà sur ce site.'],
+            ],
+        ]);
+    }
+
     public function testGetStructureEndpoint(): void
     {
         $machine   = $this->createMachine('Machine structure');