Fix Bug Preventing Denormalization of Input Classes with Different Fields

src/Serializer/AbstractItemNormalizer.php

@@ -128,9 +128,7 @@ public function supportsDenormalization($data, $type, $format = null)
     public function denormalize($data, $class, $format = null, array $context = [])
     {
         $context['api_denormalize'] = true;
-        if (!isset($context['resource_class'])) {
-            $context['resource_class'] = $class;
-        }
+        $context['resource_class'] = $class;
 
         return parent::denormalize($data, $class, $format, $context);
     }

tests/Fixtures/TestBundle/Entity/DummyForAdditionalFields.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\Core\Tests\Fixtures\TestBundle\Entity;
+
+use ApiPlatform\Core\Annotation\ApiResource;
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ApiResource
+ * @ORM\Entity
+ */
+class DummyForAdditionalFields
+{
+    /**
+     * @ORM\Id
+     * @ORM\GeneratedValue
+     * @ORM\Column(type="integer")
+     */
+    private $id;
+    /** @ORM\Column */
+    private $name;
+    /** @ORM\Column */
+    private $slug;
+
+    public function __construct(string $name, string $slug)
+    {
+        $this->name = $name;
+        $this->slug = $slug;
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getSlug(): string
+    {
+        return $this->slug;
+    }
+}

tests/Fixtures/TestBundle/Entity/DummyForAdditionalFieldsInput.php

@@ -0,0 +1,34 @@
+<?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\Core\Tests\Fixtures\TestBundle\Entity;
+
+use ApiPlatform\Core\Annotation\ApiResource;
+
+/**
+ * @ApiResource
+ */
+final class DummyForAdditionalFieldsInput
+{
+    private $dummyName;
+
+    public function __construct(string $dummyName)
+    {
+        $this->dummyName = $dummyName;
+    }
+
+    public function getDummyName(): string
+    {
+        return $this->dummyName;
+    }
+}

tests/Serializer/AbstractItemNormalizerTest.php

@@ -23,6 +23,8 @@
 use ApiPlatform\Core\Metadata\Property\PropertyNameCollection;
 use ApiPlatform\Core\Serializer\AbstractItemNormalizer;
 use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\Dummy;
+use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\DummyForAdditionalFields;
+use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\DummyForAdditionalFieldsInput;
 use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\DummyTableInheritance;
 use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\DummyTableInheritanceChild;
 use ApiPlatform\Core\Tests\Fixtures\TestBundle\Entity\RelatedDummy;
@@ -290,6 +292,48 @@ public function testDenormalize()
         ], Dummy::class);
     }
 
+    public function testCanDenormalizeInputClassWithDifferentFieldsThanResourceClass()
+    {
+        $propertyNameCollectionFactoryProphecy = $this->prophesize(PropertyNameCollectionFactoryInterface::class);
+        $propertyNameCollectionFactoryProphecy->create(DummyForAdditionalFieldsInput::class, [])->willReturn(
+            new PropertyNameCollection(['dummyName'])
+        );
+        $propertyNameCollectionFactoryProphecy->create(DummyForAdditionalFields::class, [])->willReturn(
+            new PropertyNameCollection(['id', 'name', 'slug'])
+        );
+
+        $propertyMetadataFactoryProphecy = $this->prophesize(PropertyMetadataFactoryInterface::class);
+        // Create DummyForAdditionalFieldsInput mocks
+        $propertyMetadataFactoryProphecy->create(DummyForAdditionalFieldsInput::class, 'dummyName', [])->willReturn(
+            (new PropertyMetadata(new Type(Type::BUILTIN_TYPE_STRING), '', true, false))->withInitializable(true)
+        );
+        // Create DummyForAdditionalFields mocks
+        $propertyMetadataFactoryProphecy->create(DummyForAdditionalFields::class, 'id', [])->willReturn(
+            (new PropertyMetadata(new Type(Type::BUILTIN_TYPE_INT), '', true, false))->withInitializable(false)
+        );
+        $propertyMetadataFactoryProphecy->create(DummyForAdditionalFields::class, 'name', [])->willReturn(
+            (new PropertyMetadata(new Type(Type::BUILTIN_TYPE_STRING), '', true, false))->withInitializable(true)
+        );
+        $propertyMetadataFactoryProphecy->create(DummyForAdditionalFields::class, 'slug', [])->willReturn(
+            (new PropertyMetadata(new Type(Type::BUILTIN_TYPE_STRING), '', true, false))->withInitializable(true)
+        );
+
+        $normalizer = new class($propertyNameCollectionFactoryProphecy->reveal(), $propertyMetadataFactoryProphecy->reveal(), $this->prophesize(IriConverterInterface::class)->reveal(), $this->prophesize(ResourceClassResolverInterface::class)->reveal()) extends AbstractItemNormalizer {
+        };
+
+        /** @var DummyForAdditionalFieldsInput $res */
+        $res = $normalizer->denormalize([
+            'dummyName' => 'Dummy Name',
+        ], DummyForAdditionalFieldsInput::class, 'json', [
+            'resource_class' => DummyForAdditionalFields::class,
+            'input_class' => DummyForAdditionalFieldsInput::class,
+            'output_class' => DummyForAdditionalFields::class,
+        ]);
+
+        $this->assertInstanceOf(DummyForAdditionalFieldsInput::class, $res);
+        $this->assertEquals('Dummy Name', $res->getDummyName());
+    }
+
     public function testDenormalizeWritableLinks()
     {
         $relatedDummy1 = new RelatedDummy();