的Kohana 3：设置/获取提示信息和会话

Question

我的基本控制器有以下几点：

protected $session; 

public function before() 
{ 
    parent::before(); 

    $this->session = Session::instance(); 
} 

扩展该控制器和当用户试图登录我重定向用户，如果用户名/密码一直没有填入：

if($this->request->method() == Request::POST) 
{ 
    $username = $this->request->post('username'); 
    $password = $this->request->post('password'); 

    if(strlen($username) == 0) 
    { 
     $this->session->set('error', 'Please enter a Username'); 
     Request::current()->redirect('user/login'); 
    } 

    if(strlen($password) == 0) 
    { 
     $this->session->set('error', 'Please enter a Password'); 
     Request::current()->redirect('user/login'); 
    } 
} 

$error = $this->session->get_once('error'); 

$view = View::factory('user/login'); 
$view->bind('title', $title); 
$view->bind('error', $error); 
echo $view->render(); 

但是，$ error参数在返回时始终为NULL。这是因为会话通过基本控制器重置吗？我该怎么做才能避免这种情况？

Answer 1

为什么你这么复杂简单的事情？有没有需要使用会话的错误处理...

if($this->request->method() == Request::POST) 
{ 
    $username = $this->request->post('username'); 
    $password = $this->request->post('password'); 

    if(strlen($username) == 0) 
    { 
     $error = 'Please enter a Username'; 
    } 

    if(strlen($password) == 0) 
    { 
     $error = 'Please enter a Password'; 
    } 
} 

$view = View::factory('user/login') 
    ->bind('title', $title) 
    ->bind('error', $error); 
echo $view->render();