public override void OnCreating(TransferShippingOrder model)
        {
            base.OnCreating(model);

            model._CreatedAgent      = "Service";
            model._CreatedBy         = this.Username;
            model._LastModifiedAgent = "Service";
            model._LastModifiedBy    = this.Username;

            TransferShippingOrderItemService shippingOrderItemService = ServiceProvider.GetService <TransferShippingOrderItemService>();

            shippingOrderItemService.Username = this.Username;

            foreach (TransferShippingOrderItem shippingOrderItem in model.TransferShippingOrderItems)
            {
                shippingOrderItemService.OnCreating(shippingOrderItem);
            }
        }
        public override async Task <int> DeleteModel(int Id)
        {
            int Deleted = 0;

            using (var Transaction = this.DbContext.Database.BeginTransaction())
            {
                try
                {
                    TransferShippingOrderItemService transferShippingOrderItemService = ServiceProvider.GetService <TransferShippingOrderItemService>();
                    transferShippingOrderItemService.Username = this.Username;
                    TransferShippingOrderDetailService transferShippingOrderDetailService = ServiceProvider.GetService <TransferShippingOrderDetailService>();
                    transferShippingOrderDetailService.Username = this.Username;

                    HashSet <int> TransferShippingOrderItemIds = new HashSet <int>(
                        this.DbContext.TransferShippingOrderItems
                        .Where(p => p.SOId.Equals(Id))
                        .Select(p => p.Id)
                        );

                    foreach (int itemId in TransferShippingOrderItemIds)
                    {
                        HashSet <int> TransferShippingOrderDetailIds = new HashSet <int>(
                            this.DbContext.TransferShippingOrderDetails
                            .Where(p => p.SOItemId.Equals(itemId))
                            .Select(p => p.Id)
                            );

                        foreach (int detailId in TransferShippingOrderDetailIds)
                        {
                            await transferShippingOrderDetailService.DeleteModel(detailId);

                            TransferShippingOrderItem item = this.DbContext.TransferShippingOrderItems
                                                             .Include(d => d.TransferShippingOrderDetails)
                                                             .FirstOrDefault(p => p.Id.Equals(itemId));

                            if (item != null)
                            {
                                foreach (var detail in item.TransferShippingOrderDetails)
                                {
                                    TransferDeliveryOrderDetail transferDeliveryOrderDetail = this.DbContext.TransferDeliveryOrderDetails.FirstOrDefault(s => s.Id == detail.DODetailId);
                                    transferDeliveryOrderDetail.ShippingOrderQuantity -= (int)detail.DeliveryQuantity;
                                    transferDeliveryOrderDetail.RemainingQuantity     += (int)detail.DeliveryQuantity;

                                    TransferRequestDetail transferRequestDetail = this.DbContext.TransferRequestDetails.FirstOrDefault(s => s.Id == detail.TRDetailId);
                                    transferRequestDetail._LastModifiedUtc   = DateTime.UtcNow;
                                    transferRequestDetail._LastModifiedAgent = "Service";
                                    transferRequestDetail._LastModifiedBy    = this.Username;

                                    InternalTransferOrderDetail internalTransferOrderDetail = this.DbContext.InternalTransferOrderDetails.FirstOrDefault(s => s.Id == detail.ITODetailId);
                                    internalTransferOrderDetail._LastModifiedUtc   = DateTime.UtcNow;
                                    internalTransferOrderDetail._LastModifiedAgent = "Service";
                                    internalTransferOrderDetail._LastModifiedBy    = this.Username;

                                    if (transferDeliveryOrderDetail.RemainingQuantity == transferDeliveryOrderDetail.DOQuantity)
                                    {
                                        ExternalTransferOrderDetail externalTransferOrderDetail = this.DbContext.ExternalTransferOrderDetails.FirstOrDefault(s => s.Id == detail.ETODetailId);

                                        transferRequestDetail.Status       = externalTransferOrderDetail.RemainingQuantity > 0 ? "Barang Sudah dikirim sebagian ke Unit Pengirim" : "Barang Sudah dikirim semua ke Unit Pengirim";
                                        internalTransferOrderDetail.Status = externalTransferOrderDetail.RemainingQuantity > 0 ? "Barang Sudah dikirim sebagian ke Unit Pengirim" : "Barang Sudah dikirim semua ke Unit Pengirim";
                                    }
                                    else
                                    {
                                        transferRequestDetail.Status       = transferDeliveryOrderDetail.RemainingQuantity > 0 ? "Barang Sudah dikirim sebagian" : "Barang Sudah dikirim semua";
                                        internalTransferOrderDetail.Status = transferDeliveryOrderDetail.RemainingQuantity > 0 ? "Barang Sudah dikirim sebagian" : "Barang Sudah dikirim semua";
                                    }
                                }
                            }
                        }

                        await transferShippingOrderItemService.DeleteModel(itemId);
                    }

                    Deleted = await this.DeleteAsync(Id);

                    this.DbContext.SaveChanges();
                    Transaction.Commit();
                }
                catch (Exception)
                {
                    Transaction.Rollback();
                }
            }

            return(Deleted);
        }