fix(serializer): read groups off the root operation

features/serializer/groups_related.feature

@@ -0,0 +1,18 @@
+@php8
+@!mongodb
+Feature: Groups to embed relations
+  In order to show embed relations on a Resource
+  As a client software developer
+  I need to set up groups on the Resource embed properties
+
+  Scenario: Get a single resource
+    When I send a "GET" request to "/relation_group_impact_on_collections/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "related.title" should be equal to "foo"
+
+  Scenario: Get a collection resource not impacted by groups
+    When I send a "GET" request to "/relation_group_impact_on_collections"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "hydra:member[0].related" should be equal to "/relation_group_impact_on_collection_relations/1"

src/Hydra/Serializer/CollectionNormalizer.php

@@ -101,11 +101,21 @@ public function normalize($object, $format = null, array $context = []): array
         $data['hydra:member'] = [];
         $iriOnly = $context[self::IRI_ONLY] ?? $this->defaultContext[self::IRI_ONLY];
 
+        // We need to keep this operation for serialization groups for later
+        if (isset($context['operation'])) {
+            $context['root_operation'] = $context['operation'];
+        }
+
+        if (isset($context['operation_name'])) {
+            $context['root_operation_name'] = $context['operation_name'];
+        }
+
         if ($this->resourceMetadataCollectionFactory && ($operation = $context['operation'] ?? null) instanceof CollectionOperationInterface && ($itemUriTemplate = $operation->getItemUriTemplate())) {
             $context['operation'] = $this->resourceMetadataCollectionFactory->create($resourceClass)->getOperation($operation->getItemUriTemplate());
         } else {
             unset($context['operation']);
         }
+
         unset($context['operation_name'], $context['uri_variables']);
 
         foreach ($object as $obj) {

src/Serializer/AbstractCollectionNormalizer.php

@@ -92,13 +92,23 @@ public function normalize($object, $format = null, array $context = [])
         $data = [];
         $paginationData = $this->getPaginationData($object, $context);
 
+        // We need to keep this operation for serialization groups for later
+        if (isset($context['operation'])) {
+            $context['root_operation'] = $context['operation'];
+        }
+
+        if (isset($context['operation_name'])) {
+            $context['root_operation_name'] = $context['operation_name'];
+        }
+
         /** @var ResourceMetadata|ResourceMetadataCollection */
         $metadata = $this->resourceMetadataFactory->create($context['resource_class'] ?? '');
         if ($metadata instanceof ResourceMetadataCollection && ($operation = $context['operation'] ?? null) instanceof CollectionOperationInterface && ($itemUriTemplate = $operation->getItemUriTemplate())) {
             $context['operation'] = $metadata->getOperation($itemUriTemplate);
         } else {
             unset($context['operation']);
         }
+
         unset($context['operation_type'], $context['operation_name']);
         $itemsData = $this->getItemsData($object, $format, $context);
 

src/Serializer/AbstractItemNormalizer.php

@@ -712,7 +712,7 @@ protected function getFactoryOptions(array $context): array
         if (isset($context['resource_class']) && $this->resourceClassResolver->isResourceClass($context['resource_class']) && $this->resourceMetadataFactory instanceof ResourceMetadataCollectionFactoryInterface) {
             $resourceClass = $this->resourceClassResolver->getResourceClass(null, $context['resource_class']); // fix for abstract classes and interfaces
             // This is a hot spot, we should avoid calling this here but in many cases we can't
-            $operation = $context['operation'] ?? $this->resourceMetadataFactory->create($resourceClass)->getOperation($context['operation_name'] ?? null);
+            $operation = $context['root_operation'] ?? $context['operation'] ?? $this->resourceMetadataFactory->create($resourceClass)->getOperation($context['root_operation_name'] ?? $context['operation_name'] ?? null);
             $options['normalization_groups'] = $operation->getNormalizationContext()['groups'] ?? null;
             $options['denormalization_groups'] = $operation->getDenormalizationContext()['groups'] ?? null;
         }

tests/Fixtures/TestBundle/Entity/RelationGroupImpactOnCollection.php

@@ -0,0 +1,49 @@
+<?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;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\CollectionOperationInterface;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Operation;
+use Symfony\Component\Serializer\Annotation\Groups;
+
+#[ApiResource(
+    provider: [RelationGroupImpactOnCollection::class, 'getData']
+)]
+#[GetCollection]
+#[Get(normalizationContext: ['groups' => 'related'])]
+class RelationGroupImpactOnCollection
+{
+    public ?int $id;
+    #[Groups('related')]
+    public ?RelationGroupImpactOnCollectionRelation $related;
+
+    public function __construct($id = null, $related = null)
+    {
+        $this->id = $id;
+        $this->related = $related;
+    }
+
+    public static function getData(Operation $operation, array $uriVariables = [], array $context = []): self|array
+    {
+        $item = new self($uriVariables['id'] ?? 1, new RelationGroupImpactOnCollectionRelation(id: $uriVariables['id'] ?? 1, title: 'foo'));
+        if ($operation instanceof CollectionOperationInterface) {
+            return [$item];
+        }
+
+        return $item;
+    }
+}

tests/Fixtures/TestBundle/Entity/RelationGroupImpactOnCollectionRelation.php

@@ -0,0 +1,32 @@
+<?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;
+
+use ApiPlatform\Metadata\ApiResource;
+use Symfony\Component\Serializer\Annotation\Groups;
+
+#[ApiResource]
+class RelationGroupImpactOnCollectionRelation
+{
+    public ?int $id;
+
+    #[Groups('related')]
+    public ?string $title;
+
+    public function __construct($id, $title)
+    {
+        $this->id = $id;
+        $this->title = $title;
+    }
+}