public static function get($request, $match)
    {
        $perm = Pluf_Shortcuts_GetObjectOr404('User_Role', $match['role_id']);
        $groupModel = new User_Group();
        $param = array(
            'view' => 'join_role',
            'filter' => array(
                'id=' . $match['group_id'],
                'role_id=' . $perm->id
            )
        );
        $groups = $groupModel->getList($param);
        if ($groups->count() == 0) {
            throw new Pluf_Exception_DoesNotExist('Group has not such role');
        }
        return $groups[0];
    }