public async Task <IActionResult> Add(OrderStatusModel model)
        {
            if (!ModelState.IsValid)
            {
                return(Json(new DataSourceResult {
                    Errors = ModelState.SerializeErrors()
                }));
            }

            var status = new OrderStatus();

            status          = model.ToEntity(status);
            status.StatusId = (await _orderStatusService.GetAll()).Max(x => x.StatusId) + 10;
            await _orderStatusService.Insert(status);

            return(new JsonResult(""));
        }