CakePHP：调用成员函数allow()

<?php

class ProtectedController extends AppController {

    public $components = array(
        'Session','Auth' => array(
            'loginRedirect' => array('controller' => 'home','action' => 'index'),'logoutRedirect' => array('controller' => 'home','action' => 'index')
        )
    );

    public $paginate = array(
        'limit' => 2
    );

    public function beforeFilter() {
        $this->Auth->allow('index','view');
    }
}

AppController的

App::uses('Controller','Controller');


class AppController extends Controller {


}

UsersController

<?php

App::uses('ProtectedController','Controller');

class UsersController extends ProtectedController {

    public function beforeFilter() {
        parent::beforeFilter();
        $this->Auth->allow('add','logout');
    }
}

我一直在

Fatal Error
Error: Call to a member function allow() on a non-object    
File: /Library/WebServer/Documents/cakephp_stats/app/Controller/ProtectedController.php 
Line: 18

Notice: If you want to customize this error message,create app/View/Errors/fatal_error.ctp

现在的错误.

有人如何解决这个问题.从我看到它应该加载ProtectedController组件和AuthComponent将被加载.

编辑：

第18行是ProtectedController的这个：

public function beforeFilter() {
    $this->Auth->allow('index','view');
}

编辑：

我现在唯一能做的就是削减这个：

public $components = array(
    'Session','Auth' => array(
        'loginRedirect' => array('controller' => 'home','action' => 'index')
    )
);

到AppController然后覆盖然后允许每个人：

class AppController extends Controller {

    public $components = array(
        'Session','action' => 'index')
        )
    );

    public function beforeFilter() {
        $this->Auth->allow('*');
    }
}