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nicolas-grekasnicolas-grekas
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feature #46906 [TwigBridge] Add #[Template()] to describe how to render arrays returned by controllers (nicolas-grekas)
This PR was merged into the 6.2 branch. Discussion ---------- [TwigBridge] Add `#[Template()]` to describe how to render arrays returned by controllers | Q | A | ------------- | --- | Branch? | 6.2 | Bug fix? | no | New feature? | yes | Deprecations? | no | Tickets | Part of #44705 | License | MIT | Doc PR | - Extracted from #45415 (and modernized a lot). Unlike the``@Template`` annotation, this attribute mandates a template name as argument. This removes the need for any template-guesser logic, making things explicit. Using the attribute also turns `FormInterface` instances into `FormView`, adjusting the status code to 422 when a non-valid form is found in the parameters, similarly to what `AbstractController::render()` does. Commits ------- c252606 [TwigBridge] Add `#[Template()]` to describe how to render arrays returned by controllers
2 parents 3edca67 + c252606 commit 378902e

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-27
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12 files changed

+262
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lines changed

‎src/Symfony/Bridge/Twig/Attribute/Template.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Bridge\Twig\Attribute;
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#[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD | \Attribute::TARGET_FUNCTION)]
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class Template
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{
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public function __construct(
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/**
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* The name of the template to render.
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*/
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public string $template,
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/**
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* The controller method arguments to pass to the template.
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*/
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public ?array $vars = null,
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/**
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* Enables streaming the template.
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*/
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public bool $stream = false,
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) {
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}
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}

‎src/Symfony/Bridge/Twig/CHANGELOG.md‎

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---
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* Add `form_label_content` and `form_help_content` block to form themes
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* Add `#[Template()]` to describe how to render arrays returned by controllers
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910
6.1
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---

‎src/Symfony/Bridge/Twig/EventListener/TemplateAttributeListener.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Bridge\Twig\EventListener;
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use Symfony\Bridge\Twig\Attribute\Template;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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use Symfony\Component\Form\FormInterface;
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use Symfony\Component\HttpFoundation\Response;
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use Symfony\Component\HttpFoundation\StreamedResponse;
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use Symfony\Component\HttpKernel\Event\ControllerArgumentsEvent;
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use Symfony\Component\HttpKernel\Event\ViewEvent;
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use Symfony\Component\HttpKernel\KernelEvents;
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use Twig\Environment;
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class TemplateAttributeListener implements EventSubscriberInterface
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{
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public function __construct(
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private Environment $twig,
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) {
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}
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public function onKernelView(ViewEvent $event)
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{
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$parameters = $event->getControllerResult();
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if (!\is_array($parameters ?? [])) {
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return;
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}
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$attribute = $event->getRequest()->attributes->get('_template');
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if (!$attribute instanceof Template && !$attribute = $event->controllerArgumentsEvent?->getAttributes()[Template::class][0] ?? null) {
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return;
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}
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$parameters ??= $this->resolveParameters($event->controllerArgumentsEvent, $attribute->vars);
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$status = 200;
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foreach ($parameters as $k => $v) {
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if (!$v instanceof FormInterface) {
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continue;
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}
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if ($v->isSubmitted() && !$v->isValid()) {
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$status = 422;
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}
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$parameters[$k] = $v->createView();
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}
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$event->setResponse($attribute->stream
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? new StreamedResponse(fn () => $this->twig->display($attribute->template, $parameters), $status)
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: new Response($this->twig->render($attribute->template, $parameters), $status)
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);
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}
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public static function getSubscribedEvents(): array
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{
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return [
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KernelEvents::VIEW => ['onKernelView', -128],
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];
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}
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private function resolveParameters(ControllerArgumentsEvent $event, ?array $vars): array
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{
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if ([] === $vars) {
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return [];
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}
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$parameters = $event->getNamedArguments();
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if (null !== $vars) {
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$parameters = array_intersect_key($parameters, array_flip($vars));
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}
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return $parameters;
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}
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}

‎src/Symfony/Bridge/Twig/Tests/EventListener/TemplateAttributeListenerTest.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Bridge\Twig\Tests\EventListener;
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use PHPUnit\Framework\TestCase;
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use Symfony\Bridge\Twig\EventListener\TemplateAttributeListener;
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use Symfony\Bridge\Twig\Tests\Fixtures\TemplateAttributeController;
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use Symfony\Component\Form\FormInterface;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpKernel\Event\ControllerArgumentsEvent;
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use Symfony\Component\HttpKernel\Event\ViewEvent;
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use Symfony\Component\HttpKernel\HttpKernelInterface;
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use Twig\Environment;
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class TemplateAttributeListenerTest extends TestCase
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{
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public function testAttribute()
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{
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$twig = $this->createMock(Environment::class);
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$twig->expects($this->exactly(2))
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->method('render')
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->withConsecutive(
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['templates/foo.html.twig', ['foo' => 'bar']],
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['templates/foo.html.twig', ['bar' => 'Bar', 'buz' => 'def']]
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)
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->willReturn('Bar');
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$request = new Request();
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$kernel = $this->createMock(HttpKernelInterface::class);
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$controllerArgumentsEvent = new ControllerArgumentsEvent($kernel, [new TemplateAttributeController(), 'foo'], ['Bar'], $request, null);
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$listener = new TemplateAttributeListener($twig);
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$event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, ['foo' => 'bar'], $controllerArgumentsEvent);
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$listener->onKernelView($event);
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$this->assertSame('Bar', $event->getResponse()->getContent());
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$event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, null, $controllerArgumentsEvent);
47+
$listener->onKernelView($event);
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$this->assertSame('Bar', $event->getResponse()->getContent());
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$event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, null);
51+
$listener->onKernelView($event);
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$this->assertNull($event->getResponse());
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}
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public function testForm()
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{
57+
$request = new Request();
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$kernel = $this->createMock(HttpKernelInterface::class);
59+
$controllerArgumentsEvent = new ControllerArgumentsEvent($kernel, [new TemplateAttributeController(), 'foo'], [], $request, null);
60+
$listener = new TemplateAttributeListener($this->createMock(Environment::class));
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$form = $this->createMock(FormInterface::class);
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$form->expects($this->once())->method('createView');
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$form->expects($this->once())->method('isSubmitted')->willReturn(true);
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$form->expects($this->once())->method('isValid')->willReturn(false);
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$event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, ['bar' => $form], $controllerArgumentsEvent);
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$listener->onKernelView($event);
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$this->assertSame(422, $event->getResponse()->getStatusCode());
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}
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}

‎src/Symfony/Bridge/Twig/Tests/Fixtures/TemplateAttributeController.php‎

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <[email protected]>
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*
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* For the full copyright and license information, please view the LICENSE
9+
* file that was distributed with this source code.
10+
*/
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namespace Symfony\Bridge\Twig\Tests\Fixtures;
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use Symfony\Bridge\Twig\Attribute\Template;
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class TemplateAttributeController
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{
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#[Template('templates/foo.html.twig', vars: ['bar', 'buz'])]
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public function foo($bar, $baz = 'abc', $buz = 'def')
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{
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}
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}

‎src/Symfony/Bridge/Twig/composer.json‎

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"symfony/form": "^6.1",
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"symfony/html-sanitizer": "^6.1",
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"symfony/http-foundation": "^5.4|^6.0",
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"symfony/http-kernel": "^5.4|^6.0",
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"symfony/http-kernel": "^6.2",
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"symfony/intl": "^5.4|^6.0",
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"symfony/mime": "^5.4|^6.0",
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"symfony/polyfill-intl-icu": "~1.0",
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5858
"symfony/console": "<5.4",
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"symfony/form": "<6.1",
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"symfony/http-foundation": "<5.4",
61-
"symfony/http-kernel": "<5.4",
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"symfony/http-kernel": "<6.2",
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"symfony/translation": "<5.4",
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"symfony/workflow": "<5.4"
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},

‎src/Symfony/Bundle/TwigBundle/Resources/config/twig.php‎

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use Symfony\Bridge\Twig\AppVariable;
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use Symfony\Bridge\Twig\DataCollector\TwigDataCollector;
1717
use Symfony\Bridge\Twig\ErrorRenderer\TwigErrorRenderer;
18+
use Symfony\Bridge\Twig\EventListener\TemplateAttributeListener;
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use Symfony\Bridge\Twig\Extension\AssetExtension;
1920
use Symfony\Bridge\Twig\Extension\CodeExtension;
2021
use Symfony\Bridge\Twig\Extension\ExpressionExtension;
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169170
->args([service('serializer')])
170171

171172
->set('twig.extension.serializer', SerializerExtension::class)
173+
174+
->set('controller.template_attribute_listener', TemplateAttributeListener::class)
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->args([service('twig')])
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->tag('kernel.event_subscriber')
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;
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};

‎src/Symfony/Bundle/TwigBundle/composer.json‎

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"require": {
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"php": ">=8.1",
2020
"composer-runtime-api": ">=2.1",
21-
"symfony/config": "^5.4|^6.0",
22-
"symfony/dependency-injection": "^5.4|^6.0",
23-
"symfony/twig-bridge": "^5.4|^6.0",
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"symfony/config": "^6.1",
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"symfony/dependency-injection": "^6.1",
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"symfony/twig-bridge": "^6.2",
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"symfony/http-foundation": "^5.4|^6.0",
25-
"symfony/http-kernel": "^5.4|^6.0",
26-
"symfony/polyfill-ctype": "~1.8",
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"symfony/http-kernel": "^6.2",
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"twig/twig": "^2.13|^3.0.4"
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},
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"require-dev": {

‎src/Symfony/Component/HttpKernel/Event/ControllerArgumentsEvent.php‎

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{
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private ControllerEvent $controllerEvent;
3232
private array $arguments;
33+
private array $namedArguments;
3334

3435
public function __construct(HttpKernelInterface $kernel, callable|ControllerEvent $controller, array $arguments, Request $request, ?int $requestType)
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{
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5455
public function setController(callable $controller, array $attributes = null): void
5556
{
5657
$this->controllerEvent->setController($controller, $attributes);
58+
unset($this->namedArguments);
5759
}
5860

5961
public function getArguments(): array
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6466
public function setArguments(array $arguments)
6567
{
6668
$this->arguments = $arguments;
69+
unset($this->namedArguments);
70+
}
71+
72+
public function getNamedArguments(): array
73+
{
74+
if (isset($this->namedArguments)) {
75+
return $this->namedArguments;
76+
}
77+
78+
$namedArguments = [];
79+
$arguments = $this->arguments;
80+
$r = $this->getRequest()->attributes->get('_controller_reflectors')[1] ?? new \ReflectionFunction($this->controllerEvent->getController());
81+
82+
foreach ($r->getParameters() as $i => $param) {
83+
if ($param->isVariadic()) {
84+
$namedArguments[$param->name] = \array_slice($arguments, $i);
85+
break;
86+
}
87+
if (\array_key_exists($i, $arguments)) {
88+
$namedArguments[$param->name] = $arguments[$i];
89+
} elseif ($param->isDefaultvalueAvailable()) {
90+
$namedArguments[$param->name] = $param->getDefaultValue();
91+
}
92+
}
93+
94+
return $this->namedArguments = $namedArguments;
6795
}
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6997
/**

‎src/Symfony/Component/HttpKernel/Event/ViewEvent.php‎

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2525
*/
2626
final class ViewEvent extends RequestEvent
2727
{
28+
public readonly ?ControllerArgumentsEvent $controllerArgumentsEvent;
2829
private mixed $controllerResult;
2930

30-
public function __construct(HttpKernelInterface $kernel, Request $request, int $requestType, mixed $controllerResult)
31+
public function __construct(HttpKernelInterface $kernel, Request $request, int $requestType, mixed $controllerResult, ControllerArgumentsEvent $controllerArgumentsEvent = null)
3132
{
3233
parent::__construct($kernel, $request, $requestType);
3334

3435
$this->controllerResult = $controllerResult;
36+
$this->controllerArgumentsEvent = $controllerArgumentsEvent;
3537
}
3638

3739
public function getControllerResult(): mixed

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