fix(serializer): json non-resource intermitent class

features/issues/5926.feature

@@ -0,0 +1,12 @@
+Feature: Issue 5926
+  In order to reproduce the issue at https://github.com/api-platform/core/issues/5926
+  As a client software developer
+  I need to be able to use every operation on a resource with non-resources embed objects
+
+  @!mongodb
+  Scenario: Create and retrieve a WriteResource
+    When I add "Accept" header equal to "application/json"
+    And I send a "GET" request to "/test_issue5926s/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/json; charset=utf-8"

src/JsonLd/Serializer/ItemNormalizer.php

@@ -81,8 +81,8 @@ public function normalize(mixed $object, string $format = null, array $context =
         // TODO: we should not remove the resource_class in the normalizeRawCollection as we would find out anyway that it's not the same as the requested one
         $previousResourceClass = $context['resource_class'] ?? null;
         $metadata = [];
-        if ($isResourceClass = $this->resourceClassResolver->isResourceClass($resourceClass)) {
-            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $context['resource_class'] ?? null);
+        if ($isResourceClass = $this->resourceClassResolver->isResourceClass($resourceClass) && (null === $previousResourceClass || $this->resourceClassResolver->isResourceClass($previousResourceClass))) {
+            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $previousResourceClass);
             $context = $this->initContext($resourceClass, $context);
             $metadata = $this->addJsonLdContext($this->contextBuilder, $resourceClass, $context);
         } elseif ($this->contextBuilder instanceof AnonymousContextBuilderInterface) {

src/Serializer/AbstractItemNormalizer.php

@@ -710,8 +710,8 @@ protected function getAttributeValue(object $object, string $attribute, string $
             );
 
             // Anonymous resources
-            if ($type->getClassName()) {
-                $childContext = $this->createChildContext($this->createOperationContext($context, null), $attribute, $format);
+            if ($className) {
+                $childContext = $this->createChildContext($this->createOperationContext($context, $className), $attribute, $format);
                 $childContext['output']['gen_id'] = $propertyMetadata->getGenId() ?? true;
 
                 $attributeValue = $this->propertyAccessor->getValue($object, $attribute);

tests/Fixtures/TestBundle/Entity/Issue5926/ContentItemCollection.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * 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\Issue5926;
+
+class ContentItemCollection implements \IteratorAggregate
+{
+    private array $items;
+
+    public function __construct(ContentItemInterface ...$items)
+    {
+        $this->items = $items;
+    }
+
+    public function getIterator(): \Traversable
+    {
+        return new \ArrayIterator($this->items);
+    }
+}

tests/Fixtures/TestBundle/Entity/Issue5926/ContentItemInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * 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\Issue5926;
+
+interface ContentItemInterface
+{
+}

tests/Fixtures/TestBundle/Entity/Issue5926/Media.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * 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\Issue5926;
+
+use ApiPlatform\Metadata\ApiResource;
+
+#[ApiResource]
+class Media
+{
+    public function __construct(
+        private readonly string $id,
+        private readonly string $title,
+    ) {
+    }
+
+    public function getId(): string
+    {
+        return $this->id;
+    }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+}

tests/Fixtures/TestBundle/Entity/Issue5926/MediaContentItem.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * 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\Issue5926;
+
+class MediaContentItem implements ContentItemInterface
+{
+    public function __construct(
+        private readonly Media $media,
+    ) {
+    }
+
+    public function getMedia(): Media
+    {
+        return $this->media;
+    }
+}

tests/Fixtures/TestBundle/Entity/Issue5926/TestIssue5926.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * 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\Issue5926;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\Operation;
+
+#[ApiResource(
+    operations: [
+        new Get(
+            provider: [TestIssue5926::class, 'provide']
+        ),
+    ]
+)]
+class TestIssue5926
+{
+    public function __construct(
+        private readonly string $id,
+        private readonly ?ContentItemCollection $content,
+    ) {
+    }
+
+    public function getId(): string
+    {
+        return $this->id;
+    }
+
+    public function getContent(): ?ContentItemCollection
+    {
+        return $this->content;
+    }
+
+    public static function provide(Operation $operation, array $uriVariables = [], array $context = []): object|array|null
+    {
+        $media = new Media('1', 'My media');
+        $contentItem1 = new MediaContentItem($media);
+        $media = new Media('2', 'My media 2');
+        $contentItem2 = new MediaContentItem($media);
+
+        $collection = new ContentItemCollection($contentItem1, $contentItem2);
+
+        return new self('1', $collection);
+    }
+}