fix: cascade delete attribute values when attribute definition is removed

FK on attribute_values.attribute_definition_id now uses ON DELETE CASCADE
so deleting an AttributeDefinition also clears its values from all
articles. Admin delete action shows a confirmation warning.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

migrations/Version20260520060000.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260520060000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Cascade delete attribute_values when attribute_definition is deleted';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE app.attribute_values DROP CONSTRAINT fk_6f6a862d7492f274');
+        $this->addSql('ALTER TABLE app.attribute_values ADD CONSTRAINT fk_6f6a862d7492f274 FOREIGN KEY (attribute_definition_id) REFERENCES app.attribute_definitions (id) ON DELETE CASCADE');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE app.attribute_values DROP CONSTRAINT fk_6f6a862d7492f274');
+        $this->addSql('ALTER TABLE app.attribute_values ADD CONSTRAINT fk_6f6a862d7492f274 FOREIGN KEY (attribute_definition_id) REFERENCES app.attribute_definitions (id)');
+    }
+}

src/Domain/Article/AttributeValue.php

@@ -21,7 +21,7 @@ class AttributeValue
     private Article $article;
 
     #[ORM\ManyToOne(targetEntity: AttributeDefinition::class)]
-    #[ORM\JoinColumn(nullable: false)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
     private AttributeDefinition $attributeDefinition;
 
     #[ORM\Column(type: 'text')]

src/Infrastructure/Http/Controller/Admin/AttributeDefinitionCrudController.php

@@ -7,6 +7,8 @@ namespace App\Infrastructure\Http\Controller\Admin;
 use App\Domain\Article\AttributeDefinition;
 use App\Domain\Article\AttributeType;
 use App\Infrastructure\Http\Form\StringArrayType;
+use EasyCorp\Bundle\EasyAdminBundle\Config\Action;
+use EasyCorp\Bundle\EasyAdminBundle\Config\Actions;
 use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
 use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;
 use EasyCorp\Bundle\EasyAdminBundle\Field\ChoiceField;
@@ -24,6 +26,14 @@ final class AttributeDefinitionCrudController extends AbstractCrudController
         return AttributeDefinition::class;
     }
 
+    public function configureActions(Actions $actions): Actions
+    {
+        return $actions
+            ->update(Crud::PAGE_INDEX, Action::DELETE, static fn (Action $a) => $a
+                ->askConfirmation(new TranslatableMessage('action.delete_attribute_confirm', [], 'admin'))
+            );
+    }
+
     public function configureCrud(Crud $crud): Crud
     {
         return $crud

translations/admin.de.yaml

@@ -77,6 +77,7 @@ field.locale: Sprache
 field.domain: Bereich
 field.translation_key: Schlüssel
 field.translation_value: Übersetzung
+action.delete_attribute_confirm: 'Attribut löschen? Alle gespeicherten Werte in bestehenden Artikeln werden ebenfalls gelöscht.'
 action.retry: Wiederholen
 action.retry_confirm: 'Diesen Pipeline-Job ab dem aktuellen Schritt neu einreihen?'
 action.rerun_ai: 'KI neu starten'

translations/admin.en.yaml

@@ -77,6 +77,7 @@ field.locale: Locale
 field.domain: Domain
 field.translation_key: Key
 field.translation_value: Value
+action.delete_attribute_confirm: 'Delete this attribute? All values stored on existing articles will also be deleted.'
 action.retry: Retry
 action.retry_confirm: 'Re-queue this pipeline job from the current step?'
 action.rerun_ai: 'Re-run AI'