fix(laravel): skip relation metadata for abstract Eloquent models (#7933)

Author: cay89

src/Laravel/Eloquent/Serializer/Mapping/Loader/RelationMetadataLoader.php

@@ -42,6 +42,10 @@ public function loadClassMetadata(ClassMetadataInterface $classMetadata): bool
         }
 
         $refl = $classMetadata->getReflectionClass();
+        if ($refl->isAbstract()) {
+            return false;
+        }
+
         /** @var Model */
         $model = $refl->newInstanceWithoutConstructor();
         $attributesMetadata = $classMetadata->getAttributesMetadata();

src/Laravel/Tests/Eloquent/Serializer/Mapping/Loader/RelationMetadataLoaderTest.php

@@ -0,0 +1,35 @@
+<?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\Laravel\Tests\Eloquent\Serializer\Mapping\Loader;
+
+use ApiPlatform\Laravel\Eloquent\Metadata\ModelMetadata;
+use ApiPlatform\Laravel\Eloquent\Serializer\Mapping\Loader\RelationMetadataLoader;
+use Orchestra\Testbench\TestCase;
+use Symfony\Component\Serializer\Mapping\ClassMetadata;
+use Workbench\App\Models\AbstractModel;
+
+class RelationMetadataLoaderTest extends TestCase
+{
+    /**
+     * @see https://github.com/api-platform/core/issues/7911
+     */
+    public function testLoadClassMetadataReturnsFalseForAbstractModelWithoutInstantiating(): void
+    {
+        $loader = new RelationMetadataLoader(new ModelMetadata());
+
+        $result = $loader->loadClassMetadata(new ClassMetadata(AbstractModel::class));
+
+        $this->assertFalse($result);
+    }
+}

src/Laravel/workbench/app/Models/AbstractModel.php

@@ -0,0 +1,20 @@
+<?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 Workbench\App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+abstract class AbstractModel extends Model
+{
+}