feat(serializer): check in child classes attribute's groups for serialization

src/Metadata/Property/Factory/SerializerPropertyMetadataFactory.php

@@ -17,6 +17,7 @@
 use ApiPlatform\Metadata\Exception\ResourceClassNotFoundException;
 use ApiPlatform\Metadata\ResourceClassResolverInterface;
 use ApiPlatform\Metadata\Util\ResourceClassInfoTrait;
+use Doctrine\ORM\Mapping\DiscriminatorMap;
 use Symfony\Component\Serializer\Mapping\AttributeMetadataInterface;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface as SerializerClassMetadataFactoryInterface;
 
@@ -30,7 +31,7 @@ final class SerializerPropertyMetadataFactory implements PropertyMetadataFactory
 {
     use ResourceClassInfoTrait;
 
-    public function __construct(private readonly SerializerClassMetadataFactoryInterface $serializerClassMetadataFactory, private readonly PropertyMetadataFactoryInterface $decorated, ?ResourceClassResolverInterface $resourceClassResolver = null)
+    public function __construct(private readonly SerializerClassMetadataFactoryInterface $serializerClassMetadataFactory, private readonly PropertyMetadataFactoryInterface $decorated, ?ResourceClassResolverInterface $resourceClassResolver = null, private readonly ?bool $normalizeChildClassAttributeGroups = null)
     {
         $this->resourceClassResolver = $resourceClassResolver;
     }
@@ -203,6 +204,18 @@ private function getClassSerializerGroups(string $class): array
             $groups[] = $serializerAttributeMetadata->getGroups();
         }
 
+        if (true === $this->normalizeChildClassAttributeGroups) {
+            foreach ($serializerClassMetadata->getReflectionClass()->getAttributes() as $reflectionAttribute) {
+                if (DiscriminatorMap::class !== $reflectionAttribute->getName()) {
+                    continue;
+                }
+
+                foreach ($reflectionAttribute->getArguments()[0] as $class) {
+                    $groups = [...$groups, $this->getClassSerializerGroups($class)];
+                }
+            }
+        }
+
         return array_unique(array_merge(...$groups));
     }
 }

src/Symfony/Bundle/DependencyInjection/ApiPlatformExtension.php

@@ -257,6 +257,7 @@ private function registerCommonConfiguration(ContainerBuilder $container, array
         $container->setParameter('api_platform.description', $config['description']);
         $container->setParameter('api_platform.version', $config['version']);
         $container->setParameter('api_platform.show_webby', $config['show_webby']);
+        $container->setParameter('api_platform.normalize_child_class_attribute_groups', $config['normalize_child_class_attribute_groups']);
         $container->setParameter('api_platform.url_generation_strategy', $config['defaults']['url_generation_strategy'] ?? UrlGeneratorInterface::ABS_PATH);
         $container->setParameter('api_platform.exception_to_status', $config['exception_to_status']);
         $container->setParameter('api_platform.formats', $formats);

src/Symfony/Bundle/DependencyInjection/Configuration.php

@@ -88,6 +88,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                 ->booleanNode('show_webby')->defaultTrue()->info('If true, show Webby on the documentation page')->end()
                 ->booleanNode('event_listeners_backward_compatibility_layer')->defaultNull()->info('If true API Platform uses Symfony event listeners instead of providers and processors.')->end()
                 ->booleanNode('use_symfony_listeners')->defaultNull()->info(sprintf('Uses Symfony event listeners instead of the %s.', MainController::class))->end()
+                ->booleanNode('normalize_child_class_attribute_groups')->defaultNull()->info('Search in child classes groups for normalization')->end()
                 ->scalarNode('name_converter')->defaultNull()->info('Specify a name converter to use.')->end()
                 ->scalarNode('asset_package')->defaultNull()->info('Specify an asset package name to use.')->end()
                 ->scalarNode('path_segment_name_generator')->defaultValue('api_platform.metadata.path_segment_name_generator.underscore')->info('Specify a path name generator to use.')->end()

src/Symfony/Bundle/Resources/config/metadata/property.xml

@@ -21,6 +21,7 @@
             <argument type="service" id="serializer.mapping.class_metadata_factory" />
             <argument type="service" id="api_platform.metadata.property.metadata_factory.serializer.inner" />
             <argument type="service" id="api_platform.resource_class_resolver" />
+            <argument>%api_platform.normalize_child_class_attribute_groups%</argument>
         </service>
 
         <service id="api_platform.metadata.property.metadata_factory.cached" class="ApiPlatform\Metadata\Property\Factory\CachedPropertyMetadataFactory" decorates="api_platform.metadata.property.metadata_factory" decoration-priority="-10" public="false">

tests/Symfony/Bundle/DependencyInjection/ConfigurationTest.php

@@ -232,6 +232,7 @@ private function runDefaultConfigTests(array $doctrineIntegrationsToLoad = ['orm
             'use_symfony_listeners' => false,
             'handle_symfony_errors' => false,
             'enable_link_security' => false,
+            'normalize_child_class_attribute_groups' => null,
         ], $config);
     }