symfony · ruudk · May 22, 2025
@@ -13,6 +13,7 @@
 
 use Symfony\Component\PropertyAccess\Exception\UninitializedPropertyException;
 use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
+use Symfony\Component\Serializer\Mapping\AttributeMetadata;
 use Symfony\Component\Serializer\Mapping\ClassDiscriminatorResolverInterface;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
 use Symfony\Component\Serializer\NameConverter\NameConverterInterface;
@@ -221,4 +222,28 @@ private function getReflectionProperty(string|object $classOrObject, string $att
             }
         }
     }
+
+    protected function getAllowedAttributes(string|object $classOrObject, array $context, bool $attributesAsString = false): array|bool
+    {
+        if (false === $allowedAttributes = parent::getAllowedAttributes($classOrObject, $context, $attributesAsString)) {
+            return false;
+        }
+
+        if (null !== $this->classDiscriminatorResolver) {
+            $class = \is_object($classOrObject) ? $classOrObject::class : $classOrObject;
+            if (null !== $discriminatorMapping = $this->classDiscriminatorResolver->getMappingForMappedObject($classOrObject)) {
+                $allowedAttributes[] = $attributesAsString ? $discriminatorMapping->getTypeProperty() : new AttributeMetadata($discriminatorMapping->getTypeProperty());
+            }
+
+            if (null !== $discriminatorMapping = $this->classDiscriminatorResolver->getMappingForClass($class)) {
+                $attributes = [];
+                foreach ($discriminatorMapping->getTypesMapping() as $mappedClass) {
+                    $attributes[] = parent::getAllowedAttributes($mappedClass, $context, $attributesAsString);
+                }
+                $allowedAttributes = array_merge($allowedAttributes, ...$attributes);
+            }
+        }
+
+        return $allowedAttributes;
+    }
 }
@@ -20,6 +20,7 @@
     'one' => DummyMessageNumberOne::class,
     'two' => DummyMessageNumberTwo::class,
     'three' => DummyMessageNumberThree::class,
+    'four' => DummyMessageNumberFour::class,
 ])]
 interface DummyMessageInterface
 {

@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Tests\Fixtures;
+
+use Symfony\Component\Serializer\Attribute\Ignore;
+use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageInterface;
+
+abstract class SomeAbstract {
+    #[Ignore]
+    public function getDescription()
+    {
+        return 'Hello, World!';
+    }
+}
+
+/**
+ * @author Samuel Roze <samuel.roze@gmail.com>
+ */
+class DummyMessageNumberFour extends SomeAbstract implements DummyMessageInterface
+{
+    public function __construct(public $one)
+    {
+    }
+}
@@ -54,6 +54,7 @@
 use Symfony\Component\Serializer\Tests\Fixtures\DenormalizableDummy;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyFirstChildQuux;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageInterface;
+use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberFour;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberOne;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberThree;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberTwo;
@@ -504,6 +505,29 @@ public function testDeserializeAndSerializeNestedAbstractAndInterfacedObjectsWit
         $this->assertEquals($example, $deserialized);
     }
 
+    public function testDeserializeAndSerializeConstructorAndIgnoreAndInterfacedObjectsWithTheClassMetadataDiscriminator()
+    {
+        $example = new DummyMessageNumberFour('Hello');
+
+        $classMetadataFactory = new ClassMetadataFactory(new AttributeLoader());
+
+        $serializer = new Serializer(
+            [
+                new PropertyNormalizer(
+                    $classMetadataFactory,
+                    null,
+                    new PropertyInfoExtractor([], [new PhpDocExtractor(), new ReflectionExtractor()]),
+                    new ClassDiscriminatorFromClassMetadata($classMetadataFactory),
+                ),
+            ], ['json' => new JsonEncoder()],
+        );
+
+        $serialized = $serializer->serialize($example, 'json');
+        $deserialized = $serializer->deserialize($serialized, DummyMessageInterface::class, 'json');
+
+        $this->assertEquals($example, $deserialized);
+    }
+
     public function testExceptionWhenTypeIsNotKnownInDiscriminator()
     {
         try {