Symfony2框架下一个简单Ajax留言板-PHP源码

getDoctrine()->getEntityManager();
        $query = $em->createQuery(
             &＃39;SELECT m FROM DpDriveplusBundle:Messageboard m ORDER BY m.id DESC&＃39;
         );
        $comments = $query->getResult();
        $count = count($comments);
        return $this->render(&＃39;DpDriveplusBundle:Message:index.html.twig&＃39;, array(&＃39;comments&＃39;=>$comments, &＃39;count&＃39;=>$count));
    }
    
    public function ajaxAction()
    {      
        $request = $this->getRequest();
        $ret = &＃39;&＃39;;
             
        if (&＃39;POST&＃39; === $request->getMethod()) {       
            $name = $request->get(&＃39;name&＃39;);
            $message = $request->get(&＃39;message&＃39;);          
            $ret = &＃39;姓名：&＃39;.$name.&＃39;
 留言内容：&＃39;.$message.&＃39;
&＃39;;
            
            $comment = new Messageboard();
            $comment->setName($name);
            $comment->setMessage($message);
            $em = $this->getDoctrine()->getEntityManager();
            $em->persist($comment);       
            $em->flush();
            
            return new Response($ret);
        }
    }
}