Kohana 3：设置/获取 Flash 消息和会话

Question

我的基本控制器具有以下功能：

protected $session;

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

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

我扩展了这个控制器，当用户尝试登录时，如果没有填写用户名/密码，我会重定向用户：

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。这是因为会话正在通过 Base 控制器重置吗？我应该怎么做才能避免这种情况？

Answer 1

为什么你把简单的事情搞得这么复杂？不需要使用会话进行错误处理...

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();