fix(metadata): allow serializer attribute object in ApiProperty::$serialize (#6946)

Author: dunglas

src/Metadata/ApiProperty.php

@@ -26,7 +26,7 @@
  *
  * @author Kévin Dunglas <[email protected]>
  */
-#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::TARGET_PARAMETER | \Attribute::TARGET_CLASS_CONSTANT | \Attribute::TARGET_CLASS)]
+#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::TARGET_PARAMETER | \Attribute::TARGET_CLASS_CONSTANT | \Attribute::TARGET_CLASS | \Attribute::IS_REPEATABLE)]
 final class ApiProperty
 {
     private ?array $types;
@@ -219,7 +219,7 @@ public function __construct(
         private array $extraProperties = [],
     ) {
         $this->types = \is_string($types) ? (array) $types : $types;
-        $this->serialize = \is_array($serialize) ? $serialize : (array) $serialize;
+        $this->serialize = \is_array($serialize) ? $serialize : [$serialize];
     }
 
     public function getProperty(): ?string

src/Serializer/Mapping/Loader/PropertyMetadataLoader.php

@@ -40,7 +40,6 @@ public function __construct(private readonly PropertyNameCollectionFactoryInterf
 
     public function loadClassMetadata(ClassMetadataInterface $classMetadata): bool
     {
-        $attributesMetadata = $classMetadata->getAttributesMetadata();
         // It's very weird to grab Eloquent's properties in that case as they're never serialized
         // the Serializer makes a call on the abstract class, let's save some unneeded work with a condition
         if (Model::class === $classMetadata->getName()) {