beforeFilter()的案例，大家可以看下哦

beforeFilter()的案例。大家可以看下哦。

public function beforeFilter() {    parent::beforeFilter();    $this->Auth->allow('initDB'); // We can remove this line after we're finished}public function initDB() {    $group = $this->User->Group;    // Allow admins to everything    $group->id = 1;    $this->Acl->allow($group, 'controllers');    // allow managers to posts and widgets    $group->id = 2;    $this->Acl->deny($group, 'controllers');    $this->Acl->allow($group, 'controllers/Posts');    $this->Acl->allow($group, 'controllers/Widgets');    // allow users to only add and edit on posts and widgets    $group->id = 3;    $this->Acl->deny($group, 'controllers');    $this->Acl->allow($group, 'controllers/Posts/add');    $this->Acl->allow($group, 'controllers/Posts/edit');    $this->Acl->allow($group, 'controllers/Widgets/add');    $this->Acl->allow($group, 'controllers/Widgets/edit');    // allow basic users to log out    $this->Acl->allow($group, 'controllers/users/logout');    // we add an exit to avoid an ugly "missing views" error message    echo "all done";    exit;}