zend表单自定义验证

Question

在我的控制器中

if(isset($username) && trim($username)!=='')
{
    $exist  = $user_obj->checkUsernameExist($username);
        if($exist   ==  '1')
        {
            $form->getElement('username')->addError('This username exists.');
        }
}
if ($form->isValid($_POST) ) {
$user_obj->insertUser($_POST);
$this->_helper->flashMessenger->addMessage('User Added Successfully.');
 $this->_redirect('/users/usersadministration/');
 exit();    
}else { //echo 'failure';
     //print_r($form->getErrors());
 }

但是即使$exist值为1我的错误消息也不会显示

Answer 1

尝试

if(isset($username) && trim($username)!=='')
{
    $exist  = $user_obj->checkUsernameExist($username);
        if($exist   ==  '1')
        {
            $form->getElement('username')->addError('This username exists.');
            $form->markAsError();
        }
}

Answer 2

您的代码看起来正确，您需要提供更多代码行进行审查。