function flightdatedelete()
 {
     if (Request::ajax()) {
         $id = $_POST['fid'];
         $item = FlightDateBaseModel::find($id);
         if ($item) {
             $flight = FlightBaseModel::find($item->flight_id);
             $flight->day = $flight->day - $item->diff;
             $flight->save();
             (new Delivery())->renewCache('flight', $item->flight_id);
             $item->delete();
             (new Delivery())->renewCache('flight_date', $item->flight_id);
         }
     }
 }