setLocale的不工作的Symfony2应用

Question

我跟着这个tutorial说明进行语言环境的变化“粘性”。

并创建了一个行动改变与用户请求的语言环境。

的LocaleListener类

<?php 
namespace AppBundle\EventListener; 

use Symfony\Component\HttpKernel\Event\GetResponseEvent; 
use Symfony\Component\HttpKernel\KernelEvents; 
use Symfony\Component\EventDispatcher\EventSubscriberInterface; 

class LocaleListener implements EventSubscriberInterface 
{ 
    private $defaultLocale; 

    public function __construct($defaultLocale = 'en') 
    { 
     $this->defaultLocale = $defaultLocale; 
    } 

    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); 
     } 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 after the default Locale listener 
      KernelEvents::REQUEST => array(array('onKernelRequest', 15)), 
     ); 
    } 
} 

的目录结构：

服务

services: 
    app.locale_listener: 
      class: AppBundle\EventListener\LocaleListener 
      arguments: ['%kernel.default_locale%'] 
      tags: 
       - { name: kernel.event_subscriber } 

行动

/** 
    * @Route("/change-locale/{locale}", name="change_locale", defaults={"locale" = "it"}) 
    */ 
    public function changeLocaleAction(Request $request) { 

     $request->setLocale('it'); 

     $ref = $request->headers->get('referer'); 
     return $this->redirect($ref); 
    } 

但其没有工作，和我没有得到任何错误。为什么可能是这个问题？

Answer 1

您正在请求侦听器中请求_locale属性，但在您的路由定义中设置的属性为locale（请注意缺少的前导下划线）。

您需要相应地更新您的路由定义：

/** 
* @Route("/change-locale/{_locale}", name="change_locale", defaults={"_locale" = "it"}) 
*/ 
public function changeLocaleAction(Request $request) 
{ 
    // ... 
}