private function getOrders($q, $limit = null)
 {
     $order_model = new shopOrderModel();
     $limit = $limit ? $limit : $this->limit;
     $orders = $order_model->autocompleteById($q, $limit);
     if (!$orders) {
         return $order_model->autocompleteById($q, $limit, true);
     }
     return $orders;
 }