CakePHP HABTM List all related items

[php]
public function getRolePermisions( $roleId ){
$employee = $this->find(‘all’, array(
‘conditions’ => array( ‘RolePermission.role_id’ => $roleId )
));
$list = Set::combine($employee,'{n}.Permission.id’,'{n}.Permission.name’);
return $list;
}
[/php]