Symfony的 - getter和setter失蹤

我有一物體應該更新基本控制器：Symfony的 - getter和setter失蹤

（我硬編碼的測試ID）

namespace AppBundle\Controller; 

use Symfony\Bundle\FrameworkBundle\Controller\Controller; 
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route; 
use Symfony\Component\HttpFoundation\Request; 
use Symfony\Component\HttpFoundation\Response; 

class UserController extends Controller { 

    /** 
    * @Route("/lorem", name="ipsum") 
    */ 
    public function defaultAction(Request $request) { 

     $em = $this->getDoctrine()->getManager(); 
     $user = $em->getRepository('AppBundle:Customer\Customer')->find(3); 

     if (!$user) { 
      throw $this->createNotFoundException(
       'No user found for id 3' 
      ); 
     } 

     // I cant access setter and getter from user object ! 
     $user->setName('afsd'); 

     $em->flush(); 

     return $this->render(
      'AppBundle:directoy:index.html.twig', 
      [] 
     ); 

    } 

}

如果我想使用的setter和getter上用戶對象，我不能。