public function getStaffByAlias($alias) {
        $access = $this->getByAlias($alias);

        return $this->find('all', array(
            'conditions' => array(
                'RequestObject.parent_id' => $access['RequestObject']['id'],
                'RequestObject.foreign_key !=' => null,
                'RequestObject.model' => USER_MODEL
            ),
            'contain' => array('User', 'Parent'),
            'cache' => array(__METHOD__, $alias)
        ));
    }