4.2.0

* Added a`Symfony\Bundle\FrameworkBundle\Controller\AbstractController::addLink()` method to add Link headers to the current response

* Allowed configuring taggable cache pools via a new`framework.cache.pools.tags` option (bool|service-id)

* Allowed configuring PDO-based cache pools via a new`cache.adapter.pdo` abstract service

* Deprecated auto-injection of the container in AbstractController instances, register them as service subscribers instead

namespaceSymfony\Bundle\FrameworkBundle\Controller;

useDoctrine\Common\Persistence\ManagerRegistry;

useFig\Link\GenericLinkProvider;

useFig\Link\Link;

usePsr\Container\ContainerInterface;

useSymfony\Component\Form\Extension\Core\Type\FormType;

useSymfony\Component\Form\FormBuilderInterface;

useSymfony\Component\Form\FormInterface;

useSymfony\Component\HttpFoundation\BinaryFileResponse;

useSymfony\Component\HttpFoundation\JsonResponse;

useSymfony\Component\HttpFoundation\RedirectResponse;

useSymfony\Component\HttpFoundation\Request;

useSymfony\Component\HttpFoundation\Response;

useSymfony\Component\HttpFoundation\ResponseHeaderBag;

useSymfony\Component\HttpFoundation\StreamedResponse;

useSymfony\Component\Routing\Generator\UrlGeneratorInterface;

useSymfony\Component\Security\Core\Exception\AccessDeniedException;

useSymfony\Component\Security\Csrf\CsrfToken;

useSymfony\Component\WebLink\EventListener\AddLinkHeaderListener;

return$this->container->get('message_bus')->dispatch($message);

}

protectedfunctionaddLink(Request$request,Link$link)

{

if (!class_exists(AddLinkHeaderListener::class)) {

thrownew \LogicException('You can not use the "addLink" method if the WebLink component is not available. Try running "composer require symfony/weblink".');

}

$linkProvider =$request->attributes->get('_links',newGenericLinkProvider());

$request->attributes->set('_links',$linkProvider->withLink($link));

}

}

namespaceSymfony\Bundle\FrameworkBundle\Tests\Controller;

useFig\Link\Link;

useSymfony\Bundle\FrameworkBundle\Controller\ControllerTrait;

useSymfony\Bundle\FrameworkBundle\Tests\TestCase;

useSymfony\Component\DependencyInjection\Container;

$this->assertEquals($doctrine,$controller->getDoctrine());

}

publicfunctiontestAddLink()

{

$request =newRequest();

$link1 =newLink('mercure','https://demo.mercure.rocks');

$link2 =newLink('self','https://example.com/foo');

$controller =$this->createController();

$controller->addLink($request,$link1);

$controller->addLink($request,$link2);

$links =$request->attributes->get('_links')->getLinks();

$this->assertContains($link1,$links);

$this->assertContains($link2,$links);

}

}

trait TestControllerTrait

createFormaspublic;

createFormBuilderaspublic;

getDoctrineaspublic;

addLinkaspublic;

}

}