Access control in zend framework - zend-framework

Question

I have a bugs, actually it is error this is notice but still, I would like to fix it;
When I am try to access pages with null role, it is showing this messages:
Notice: Trying to get property of non-object in C:\Zend\Apache2\htdocs\hotelrwanda\application\plugin\AccessCheck.php on line 18
How can get it fixed here is my script:
public function preDispatch(Zend_Controller_Request_Abstract $request) {
$resource = $request->getControllerName();
$action = $request->getActionName();
$identity = $this->_auth->getStorage()->read();
$role = $identity->role;
if(!$this->_acl->isAllowed($role, $resource, $action)){
$request->setControllerName('users')
->setActionName('login');
}
}
Line: 18 is this line :$role = $identity->role;

Answer 1

public function preDispatch(Zend_Controller_Request_Abstract $request) {
$resource = $request->getControllerName();
$action = $request->getActionName();
$role = 'guest'; //your default role
if(Zend_Auth::getInstance()->hasIdentity())
{
$role = Zend_Auth::getInstance()->getIdentity()->role;
}
if(!$this->_acl->isAllowed($role, $resource, $action)){
$request->setControllerName('users')
->setActionName('login');
}
}
Here 'guest' is acting as default role . You can name it anything you like but make sure to add this role in your acl and give permission to this role accordingly .