symfony 更新到 3.4 后的应用程序级别错误

今天我从 sf2.8 升级到 sf3.4...首先我遇到了一些错误，因为我没有重新编写 sf 标准文件，现在这些错误消失了，我在应用程序级别遇到了错误。在 sf2.8 下这不是问题，我不明白为什么现在。

错误触发点击“/”：

[Tue Oct 02 11:37:31.885382 2018] [proxy_fcgi:error] [pid 24:tid 140202295097088] [client 172.29.0.1:37964] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Symfony\\Component\\Debug\\Exception\\FatalThrowableError: Type error: Argument 2 passed to TheApp\\FrontendBundle\\Services\\UrlAliasService::__construct() must be an instance of TheApp\\FrontendBundle\\Routing\\Router, instance of Symfony\\Bundle\\FrameworkBundle\\Routing\\Router given, called in /var/www/var/cache/dev/ContainerV5bxhc0/appDevDebugProjectContainer.php on line 3678 in /var/www/src/TheApp/FrontendBundle/Services/UrlAliasService.php:25\nStack trace:\n#0 /var/www/var/cache/dev/ContainerV5bxhc0/appDevDebugProjectContainer.php(3678): TheApp\\FrontendBundle\\Services\\UrlAliasService->__construct(Object(Doctrine\\ORM\\EntityManager), Object(Symfony\\Bundle\\FrameworkBundle\\Routing\\Router), Object(Cocur\\Slugify\\Slugify))\n#1 /var/www/var/cache/dev/ContainerV5bxhc0/appDevDebugProjectContainer.php(3698): ContainerV5bxhc0\\appDevDebugProjectContainer->getTheApp_UrlaliasserviceService()\n#2 /var/www/var/cache/dev/ContainerV5bxhc0/appDevDebugProjectContainer.php(3872): Contain...\n'

所以服务“UrlAliasService”需要 3 个参数：

...
use TheApp\FrontendBundle\Routing\Router;
...
public function __construct(EntityManager $entityManager, Router $router, Slugify $slugify)
    {
        $this->em = $entityManager;
        $this->urlRepository = $this->em->getRepository('TheAppFrontendBundle:UrlAlias');
        $this->router = $router;
        $this->slugify = $slugify;
        $this->urlAliasInProcess = new ArrayCollection();
    }

这 3 个参数在 services.yml 中连接：

theapp.urlaliasservice:
        class: TheApp\FrontendBundle\Services\UrlAliasService
        arguments: ["@doctrine.orm.entity_manager", "@router", "@cocur_slugify"]

这是路由器类，扩展了 BaseRouter：

namespace TheApp\FrontendBundle\Routing;

use Symfony\Bundle\FrameworkBundle\Routing\Router as BaseRouter;
...
use Symfony\Component\Routing\RequestContext;

class Router extends BaseRouter implements ContainerAwareInterface
{
    private $container;

    public function __construct(ContainerInterface $container, $resource, array $options = array(), RequestContext $context = null)
    {
        parent::__construct($container, $resource, $options, $context);
        $this->setContainer($container);
    }

    public function getGenerator()
    {
        $generator = parent::getGenerator();
        $generator->setContainer($this->container);
        return $generator;
    }

    public function setContainer(ContainerInterface $container = null)
    {
        $this->container = $container;
    }
}

所以错误告诉我传入的参数来自类型 TheApp\FrontendBundle\Routing\Router .... 但它实际上来自类型 Symfony\Bundle\FrameworkBundle\Routing\Router .... 阅读代码这个错误没有感觉对吗？TheApp\FrontendBundle\Routing\Router 类扩展了 Symfony\Bundle\FrameworkBundle\Routing\Router 那么它怎么可能不是它的实例呢？非常感谢帮助和解释。