fix(serializer): allow usage of genId property for collection (#5870)

Co-authored-by: Gaëtan Petit <[email protected]>

features/jsonld/disable_id_generation.feature

@@ -0,0 +1,9 @@
+Feature: Disable Id generation on anonymous resource collections
+
+  @!mongodb
+  @createSchema
+  Scenario: Get embed collection without ids
+    When I add "Accept" header equal to "application/ld+json"
+    And I send a "GET" request to "/disable_id_generation_collection"
+    Then the response status code should be 200
+    Then the JSON node "disableIdGenerationItems[0].@id" should not exist

src/Serializer/AbstractItemNormalizer.php

@@ -718,7 +718,8 @@ protected function getAttributeValue(object $object, string $attribute, string $
             }
 
             if ('array' === $type->getBuiltinType()) {
-                $childContext = $this->createChildContext($this->createOperationContext($context, null), $attribute, $format);
+                $childContext = $this->createChildContext($context, $attribute, $format);
+                $childContext['output']['gen_id'] = $propertyMetadata->getGenId() ?? true;
 
                 $attributeValue = $this->propertyAccessor->getValue($object, $attribute);
 

tests/Fixtures/TestBundle/Entity/DisableIdGeneration.php

@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Fixtures\TestBundle\Entity;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\Operation;
+
+#[Get('disable_id_generation_collection', provider: [DisableIdGeneration::class, 'provide'])]
+class DisableIdGeneration
+{
+    #[ApiProperty(identifier: true)]
+    public int $id;
+
+    /**
+     * @var array<DisableIdGenerationItem>
+     */
+    #[ApiProperty(genId: false)]
+    public array $disableIdGenerationItems;
+
+    public static function provide(Operation $operation, array $uriVariables = [], array $context = []): self
+    {
+        $a = new self();
+        $a->disableIdGenerationItems = [new DisableIdGenerationItem('test'), new DisableIdGenerationItem('test2')];
+
+        return $a;
+    }
+}
+
+class DisableIdGenerationItem
+{
+    public function __construct(public string $title)
+    {
+    }
+}