fix: json formatted resource should not get xml errors

src/State/ApiResource/Error.php

@@ -38,7 +38,6 @@
             routeName: '_api_errors',
             outputFormats: [
                 'json' => ['application/problem+json', 'application/json'],
-                'xml' => ['application/xml', 'text/xml'],
             ],
             hideHydraOperation: true,
             normalizationContext: [
@@ -75,6 +74,21 @@
                 'ignored_attributes' => ['trace', 'file', 'line', 'code', 'message', 'traceAsString', 'previous'],
             ],
         ),
+        new Operation(
+            errors: [],
+            name: '_api_errors_xml',
+            routeName: '_api_errors',
+            outputFormats: [
+                'xml' => ['application/xml', 'text/xml'],
+            ],
+            hideHydraOperation: true,
+            normalizationContext: [
+                SchemaFactory::OPENAPI_DEFINITION_NAME => '',
+                'groups' => ['jsonproblem'],
+                'skip_null_values' => true,
+                'ignored_attributes' => ['trace', 'file', 'line', 'code', 'message', 'traceAsString', 'previous'],
+            ],
+        ),
         new Operation(
             name: '_api_errors',
             hideHydraOperation: true,

src/Symfony/EventListener/ErrorListener.php

@@ -202,6 +202,7 @@ private function getFormatOperation(?string $format): string
             'jsonproblem' => '_api_errors_problem',
             'jsonld' => '_api_errors_hydra',
             'jsonapi' => '_api_errors_jsonapi',
+            'xml' => '_api_errors_xml',
             'html' => '_api_errors_problem', // This will be intercepted by the SwaggerUiProvider
             default => '_api_errors_problem',
         };

src/Validator/Exception/ValidationException.php

@@ -51,7 +51,6 @@
             name: '_api_validation_errors_problem',
             outputFormats: [
                 'json' => ['application/problem+json'],
-                'xml' => ['application/xml', 'text/xml'],
             ],
             normalizationContext: [
                 'groups' => ['json'],
@@ -79,6 +78,17 @@
                 'ignored_attributes' => ['trace', 'file', 'line', 'code', 'message', 'traceAsString', 'previous'],
             ]
         ),
+        new ErrorOperation(
+            name: '_api_validation_errors_xml',
+            outputFormats: [
+                'xml' => ['application/xml', 'text/xml'],
+            ],
+            normalizationContext: [
+                'groups' => ['json'],
+                'ignored_attributes' => ['trace', 'file', 'line', 'code', 'message', 'traceAsString', 'previous'],
+                'skip_null_values' => true,
+            ]
+        ),
     ],
     graphQlOperations: []
 )]

tests/Fixtures/TestBundle/ApiResource/Issue7287/OperationWithDefaultFormat.php

@@ -0,0 +1,38 @@
+<?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\Tests\Fixtures\TestBundle\ApiResource\Issue7287;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\NotExposed;
+
+#[ApiResource(
+    outputFormats: ['jsonld'],
+    operations: [
+        new GetCollection(provider: [self::class, 'provide']),
+        new NotExposed(uriVariables: ['id']),
+    ]
+)]
+class OperationWithDefaultFormat
+{
+    public function __construct(
+        public string $id,
+    ) {
+    }
+
+    public static function provide(): array
+    {
+        return [new self('1')];
+    }
+}

tests/Fixtures/app/config/config_common.yml

@@ -58,6 +58,7 @@ api_platform:
         jsonld:                        ['application/ld+json']
         jsonapi:                       ['application/vnd.api+json']
         html:                          ['text/html']
+        xml:                           ['application/xml', 'text/xml']
     graphql:
         enabled: true
         nesting_separator: __

tests/Functional/ErrorFormatTest.php

@@ -0,0 +1,65 @@
+<?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\Tests\Functional;
+
+use ApiPlatform\Symfony\Bundle\Test\ApiTestCase;
+use ApiPlatform\Tests\Fixtures\TestBundle\ApiResource\Issue7287\OperationWithDefaultFormat;
+use ApiPlatform\Tests\SetupClassResourcesTrait;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class ErrorFormatAppKernel extends \AppKernel
+{
+    protected function build(ContainerBuilder $container): void
+    {
+        parent::build($container);
+        $container->addCompilerPass(new class implements CompilerPassInterface {
+            public function process(ContainerBuilder $container): void
+            {
+                $def = $container->getDefinition('api_platform.error_listener');
+                $def->setArgument(5, ['jsonld' => ['application/ld+json']]);
+            }
+        });
+    }
+}
+
+final class ErrorFormatTest extends ApiTestCase
+{
+    use SetupClassResourcesTrait;
+
+    protected static function getKernelClass(): string
+    {
+        return ErrorFormatAppKernel::class;
+    }
+
+    protected static ?bool $alwaysBootKernel = true;
+
+    /**
+     * @return class-string[]
+     */
+    public static function getResources(): array
+    {
+        return [OperationWithDefaultFormat::class];
+    }
+
+    public function testNotAcceptableXml(): void
+    {
+        self::createClient()->request('GET', '/operation_with_default_formats', [
+            'headers' => ['accept' => 'text/xml'],
+        ]);
+
+        $this->assertJsonContains(['detail' => 'Requested format "text/xml" is not supported. Supported MIME types are "application/ld+json".']);
+        $this->assertResponseStatusCodeSame(406);
+    }
+}