Add the ability to customize multiple status codes based on the validation exception

src/Bridge/Symfony/Validator/EventListener/ValidationExceptionListener.php

@@ -13,7 +13,7 @@
 
 namespace ApiPlatform\Core\Bridge\Symfony\Validator\EventListener;
 
-use ApiPlatform\Core\Bridge\Symfony\Validator\Exception\ValidationException;
+use ApiPlatform\Core\Bridge\Symfony\Validator\Exception\ConstraintViolationListAwareExceptionInterface;
 use ApiPlatform\Core\Util\ErrorFormatGuesser;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\ExceptionEvent;
@@ -43,7 +43,7 @@ public function __construct(SerializerInterface $serializer, array $errorFormats
     public function onKernelException(ExceptionEvent $event): void
     {
         $exception = method_exists($event, 'getThrowable') ? $event->getThrowable() : $event->getException(); // @phpstan-ignore-line
-        if (!$exception instanceof ValidationException) {
+        if (!$exception instanceof ConstraintViolationListAwareExceptionInterface) {
             return;
         }
         $exceptionClass = \get_class($exception);

src/Bridge/Symfony/Validator/Exception/ConstraintViolationListAwareExceptionInterface.php

@@ -0,0 +1,28 @@
+<?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\Bridge\Symfony\Validator\Exception;
+
+use ApiPlatform\Core\Exception\ExceptionInterface;
+use Symfony\Component\Validator\ConstraintViolationListInterface;
+
+/**
+ * An exception which has a constraint violation list.
+ */
+interface ConstraintViolationListAwareExceptionInterface extends ExceptionInterface
+{
+    /**
+     * Gets constraint violations related to this exception.
+     */
+    public function getConstraintViolationList(): ConstraintViolationListInterface;
+}

src/Bridge/Symfony/Validator/Exception/ValidationException.php

@@ -21,7 +21,7 @@
  *
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-final class ValidationException extends BaseValidationException
+final class ValidationException extends BaseValidationException implements ConstraintViolationListAwareExceptionInterface
 {
     private $constraintViolationList;
 
@@ -32,9 +32,6 @@ public function __construct(ConstraintViolationListInterface $constraintViolatio
         parent::__construct($message ?: $this->__toString(), $code, $previous);
     }
 
-    /**
-     * Gets constraint violations related to this exception.
-     */
     public function getConstraintViolationList(): ConstraintViolationListInterface
     {
         return $this->constraintViolationList;

tests/Bridge/Symfony/Validator/EventListener/ValidationExceptionListenerTest.php

@@ -14,15 +14,18 @@
 namespace ApiPlatform\Core\Tests\Bridge\Symfony\Validator\EventListener;
 
 use ApiPlatform\Core\Bridge\Symfony\Validator\EventListener\ValidationExceptionListener;
+use ApiPlatform\Core\Bridge\Symfony\Validator\Exception\ConstraintViolationListAwareExceptionInterface;
 use ApiPlatform\Core\Bridge\Symfony\Validator\Exception\ValidationException;
 use ApiPlatform\Core\Tests\ProphecyTrait;
+use ApiPlatform\Core\Validator\Exception\ValidationException as BaseValidationException;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\ExceptionEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Serializer\SerializerInterface;
 use Symfony\Component\Validator\ConstraintViolationList;
+use Symfony\Component\Validator\ConstraintViolationListInterface;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
@@ -62,4 +65,50 @@ public function testValidationException()
         $this->assertSame('nosniff', $response->headers->get('X-Content-Type-Options'));
         $this->assertSame('deny', $response->headers->get('X-Frame-Options'));
     }
+
+    public function testOnKernelValidationExceptionWithCustomStatus(): void
+    {
+        $serializedConstraintViolationList = '{"foo": "bar"}';
+        $constraintViolationList = new ConstraintViolationList([]);
+        $exception = new class($constraintViolationList) extends BaseValidationException implements ConstraintViolationListAwareExceptionInterface {
+            private $constraintViolationList;
+
+            public function __construct(ConstraintViolationListInterface $constraintViolationList, $message = '', $code = 0, \Throwable $previous = null)
+            {
+                parent::__construct($message, $code, $previous);
+
+                $this->constraintViolationList = $constraintViolationList;
+            }
+
+            public function getConstraintViolationList(): ConstraintViolationListInterface
+            {
+                return $this->constraintViolationList;
+            }
+        };
+
+        $serializerProphecy = $this->prophesize(SerializerInterface::class);
+        $serializerProphecy->serialize($constraintViolationList, 'hydra')->willReturn($serializedConstraintViolationList)->shouldBeCalledOnce();
+
+        $exceptionEvent = new ExceptionEvent(
+            $this->prophesize(HttpKernelInterface::class)->reveal(),
+            new Request(),
+            HttpKernelInterface::MASTER_REQUEST,
+            $exception
+        );
+
+        (new ValidationExceptionListener(
+            $serializerProphecy->reveal(),
+            ['hydra' => ['application/ld+json']],
+            [\get_class($exception) => Response::HTTP_BAD_REQUEST]
+        ))->onKernelException($exceptionEvent);
+
+        $response = $exceptionEvent->getResponse();
+
+        self::assertInstanceOf(Response::class, $response);
+        self::assertSame($serializedConstraintViolationList, $response->getContent());
+        self::assertSame(Response::HTTP_BAD_REQUEST, $response->getStatusCode());
+        self::assertSame('application/ld+json; charset=utf-8', $response->headers->get('Content-Type'));
+        self::assertSame('nosniff', $response->headers->get('X-Content-Type-Options'));
+        self::assertSame('deny', $response->headers->get('X-Frame-Options'));
+    }
 }