Zend Form做修改页面

    public function editAction()

    {

     $request = $this->getRequest();

     $form = new User_Form_BidAdd();

  if ($this->getRequest()->isPost() && $form->isValid($request->getPost()))

  {

   $_POST['user_id'] = Zend_Auth::getInstance()->getStorage()->read()->id;

   $_POST['addtime'] = time();

   $cls = new Db_Model_Bid($_POST);

   $cls->save();

  }

  $cls = new Db_Model_Bid();

  $bid = $cls->find($request->bid);

  $form->populate($bid->toArray());

     $this->view->form = $form;

    }