EventSubscriber中的getUser实体

Question

我开始使用symfony构建我的第一个Web应用程序。在这个应用程序中，我得到了用户管理与身份验证和多语言。在用户数据库中，tabel是每个用户的lang列。我通过_GET参数更改了应用程序的默认语言，并通过运行数据库值的登录更改了应用程序的默认语言。现在我想通过EventSubscriber中的URL _GET参数切换语言来自动更改数据库中的值。不幸的是我不知道如何在我的'onKernelRequest'函数中获取用户实体来保存数据库中的选择语言。更改语言的所有逻辑都在以下代码中完成：

<?php
namespace App\EventSubscriber;

use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Security\Http\SecurityEvents;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;

class LocaleSubscriber implements EventSubscriberInterface
{
    private $defaultLocale;
    private $allowedLangs;
    private $session;

    public function __construct(SessionInterface $session, $defaultLocale = 'de')
    {
        $this->defaultLocale = $defaultLocale;
        $this->allowedLangs = ['de', 'en'];
        $this->session = $session;
    }

    public function onInteractiveLogin(InteractiveLoginEvent $event)
    {
        $user = $event->getAuthenticationToken()->getUser();

        if (null !== $user->getLocale()) {
            $this->session->set('_locale', $user->getLocale());
        }
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        $request = $event->getRequest();
        if (!$request->hasPreviousSession()) {
            return;
        }

        // try to see if the locale has been set as a _locale routing parameter
        if ($locale = $request->attributes->get('_locale')) {
            $request->getSession()->set('_locale', $locale);
        } elseif(array_key_exists('_locale', $_GET) && array_search($_GET['_locale'], $this->allowedLangs) !== FALSE) {
            $request->setLocale($_GET['_locale']);
            $request->getSession()->set('_locale', $_GET['_locale']);
        } else {
            // if no explicit locale has been set on this request, use one from the session
            $request->setLocale($request->getSession()->get('_locale', $this->defaultLocale));
        }
    }

    public static function getSubscribedEvents()
    {
        return array(
            // must be registered before (i.e. with a higher priority than) the default Locale listener
            SecurityEvents::INTERACTIVE_LOGIN => array(array('onInteractiveLogin', 15)),
            KernelEvents::REQUEST => array(array('onKernelRequest', 20)),
        );
    }
}

先谢谢彼得

Answer 1

首先，我将拆分LocaleSubscriber类并将onKernelRequest和onInteractiveLogin移动到单独的侦听器/订阅者 - 减少每个服务的依赖关系。

要获得onKernelRequest事件的当前用户，您需要注入TokenStorage服务：

use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;

class LocaleSubscriber implements EventSubscriberInterface
{
    private $tokenStorage;
    private $em;

    public function __construct(
        TokenStorageInterface $tokenStorage, 
        EntityManagerInterface $em
    ) {
        $this->tokenStorage = $tokenStorage;
        $this->em = $em;
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        if (!$event->isMasterRequest()) {
            return;
        }

        if (!$token = $this->tokenStorage->getToken()) {
            return ;
        }

        if (!$token->isAuthenticated()) {
            return ;
        }

        if (!$user = $token->getUser()) {
            return ;
        }

        $request = $event->getRequest();

        // update user
        $user->setLocale($locale);

        $this->em->flush($user);

    }

}

请注意，这未经过测试。

Answer 2

空令牌的问题是错误的事件。我切换到“KernelEvents :: CONTROLLER”。现在我得到了我的用户实体。我的工作代码：

use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;

class UserLocaleSubscriber implements EventSubscriberInterface
{
    private $tokenStorage;
    private $em;
    private $allowedLangs;

    public function __construct(TokenStorageInterface $tokenStorage, EntityManagerInterface $em)
    {
        $this->tokenStorage = $tokenStorage;
        $this->em = $em;
        $this->allowedLangs = ['de', 'en'];
    }

    public function onKernelController(FilterControllerEvent $event)
    {
        $request = $event->getRequest();
        if (!$request->hasPreviousSession()) {
            return;
        }

        if(array_key_exists('_locale', $_GET) && array_search($_GET['_locale'], $this->allowedLangs) !== FALSE) {
            if (!$event->isMasterRequest()) {
                return;
            }

            if (!$token = $this->tokenStorage->getToken()) {
                return ;
            }

            if (!$token->isAuthenticated()) {
                return ;
            }

            if (!$user = $token->getUser()) {
                return ;
            }

            $locale = $_GET['_locale'];
            // update user
            $user->setLocale($locale);

            $this->em->flush($user);
            $request->setLocale($locale);
            $request->getSession()->set('_locale', $locale);
        }
    }

    public static function getSubscribedEvents()
    {
        return array(
            // must be registered before (i.e. with a higher priority than) the default Locale listener
            KernelEvents::CONTROLLER => array(array('onKernelController', 1)),
        );
    }
}

Answer 3

实体存在于LifecycleEventArgs中。

public function prePersist(LifecycleEventArgs $args)
{
    $entity = $args->getEntity();