如何编写来自symfony2服务的Flash消息？

Question

难道你们中的任何一位symfony2大师能够告诉我如何从symfony2服务写入flash消息吗？

我原本以为我需要的东西，当我注入下面的容器，但显然不是，我得到错误

Fatal error: Call to undefined method appDevDebugProjectContainer::getRequest() in /var/www/cloudsign_beta/src/BizTV/CommonBundle/Helper/globalHelper.php on line 135 

因此很明显，我无法访问的请求......如果我要传递以及从控制器我很快就会失去一个服务点，它是无法自己做任何事情=）

<?php 
namespace BizTV\CommonBundle\Helper; 

use Symfony\Component\DependencyInjection\ContainerInterface as Container; 
use Doctrine\ORM\EntityManager as EntityManager; 

use BizTV\CommonBundle\Entity\Log; 

class globalHelper {  

    private $container; 
    private $em; 

    public function __construct(Container $container, EntityManager $em) { 
     $this->container = $container; 
     $this->em = $em; 
    } 

    public function log($type,$message) { 

     // currently $type can be 'success', 'fail' or 'error'. 

     $currentUser = $this->container->get('security.context')->getToken()->getUser(); 
     $currentCompany = $this->container->get('security.context')->getToken()->getUser()->getCompany(); 

     //if the $type is one that we want to write to the log then create log entity (we don't log failed attempts at operations, but we do log errors. 
     if ($type == 'success') { 
      $em = $this->em; 
      $now = new \DateTime("now"); 

      $entity = new Log(); 
      $entity->setCompany($currentCompany); 
      $entity->setExecutor($currentUser); 
      $entity->setTime($now); 
      $entity->setEventType($type); 
      $entity->setEventMessage($message); 

      $em->persist($entity); 
      $em->flush(); 
     } 

     //flash out the $message message text 
     $container = $this->container; 
     $session = $container->getRequest()->getSession()->setFlash($type, $message); 

    } 

} 

Answer 1

$session = $container->get('request')->getSession()->setFlash($type, $message); 

但要小心，因为你可能不知道是否request存在与否。管理这种方法的适当方法将是restricting your service to the request scope。