fix(object-mapper): on creation, give expected class to object mapper

src/State/Processor/ObjectMapperProcessor.php

@@ -15,6 +15,7 @@
 
 use ApiPlatform\Metadata\Operation;
 use ApiPlatform\State\ProcessorInterface;
+use ApiPlatform\State\Util\StateOptionsTrait;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\ObjectMapper\ObjectMapperInterface;
 
@@ -23,13 +24,16 @@
  */
 final class ObjectMapperProcessor implements ProcessorInterface
 {
+    use StateOptionsTrait;
+
     /**
      * @param ProcessorInterface<mixed,mixed> $decorated
      */
     public function __construct(
         private readonly ?ObjectMapperInterface $objectMapper,
-        private readonly ProcessorInterface $decorated,
-    ) {
+        private readonly ProcessorInterface     $decorated,
+    )
+    {
     }
 
     public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): object|array|null
@@ -48,9 +52,17 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
         }
 
         $request = $context['request'] ?? null;
+
+        // maps the Resource to an Entity
+        if ($request?->attributes->get('mapped_data')) {
+            $mappedData = $this->objectMapper->map($data, $request?->attributes->get('mapped_data'));
+        } else {
+            $mappedData = $this->objectMapper->map($data, $this->getStateOptionsClass($operation, $operation->getClass()));
+        }
+        $request?->attributes->set('mapped_data', $mappedData);
+
         $persisted = $this->decorated->process(
-            // maps the Resource to an Entity
-            $this->objectMapper->map($data, $request?->attributes->get('mapped_data')),
+            $mappedData,
             $operation,
             $uriVariables,
             $context,
@@ -65,7 +77,7 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
 
         // return the Resource representation of the persisted entity
         return $this->objectMapper->map(
-            // persist the entity
+        // persist the entity
             $persisted,
             $operation->getClass()
         );

src/Symfony/Tests/Fixtures/AnotherMappedObject.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace ApiPlatform\Symfony\Tests\Fixtures;
+
+class AnotherMappedObject
+{
+
+}

tests/Fixtures/TestBundle/ApiResource/FirstResource.php

@@ -16,6 +16,7 @@
 use ApiPlatform\Doctrine\Orm\State\Options;
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Symfony\Tests\Fixtures\AnotherMappedObject;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\SameEntity;
 use Symfony\Component\ObjectMapper\Attribute\Map;
 
@@ -24,6 +25,7 @@
     operations: [new GetCollection()],
     stateOptions: new Options(entityClass: SameEntity::class)
 )]
+#[Map(target: AnotherMappedObject::class)]
 #[Map(target: SameEntity::class)]
 final class FirstResource
 {

tests/Fixtures/TestBundle/ApiResource/MappedResource.php

@@ -16,13 +16,15 @@
 use ApiPlatform\Doctrine\Orm\State\Options;
 use ApiPlatform\JsonLd\ContextBuilder;
 use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Symfony\Tests\Fixtures\AnotherMappedObject;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\MappedEntity;
 use Symfony\Component\ObjectMapper\Attribute\Map;
 
 #[ApiResource(
     stateOptions: new Options(entityClass: MappedEntity::class),
     normalizationContext: [ContextBuilder::HYDRA_CONTEXT_HAS_PREFIX => false],
 )]
+#[Map(target: AnotherMappedObject::class)]
 #[Map(target: MappedEntity::class)]
 final class MappedResource
 {

tests/Fixtures/TestBundle/ApiResource/MappedResourceOdm.php

@@ -16,13 +16,15 @@
 use ApiPlatform\Doctrine\Odm\State\Options;
 use ApiPlatform\JsonLd\ContextBuilder;
 use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Symfony\Tests\Fixtures\AnotherMappedObject;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\MappedDocument;
 use Symfony\Component\ObjectMapper\Attribute\Map;
 
 #[ApiResource(
     stateOptions: new Options(documentClass: MappedDocument::class),
     normalizationContext: [ContextBuilder::HYDRA_CONTEXT_HAS_PREFIX => false],
 )]
+#[Map(target: AnotherMappedObject::class)]
 #[Map(target: MappedDocument::class)]
 final class MappedResourceOdm
 {