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;
    }