public async Task <IActionResult> Edit(int id, SalesRecord salesRecord)
        {
            if (!ModelState.IsValid)
            {
                var sellers = await _sellerService.FindAllAsync();

                var viewModel = new SalesFormViewModel {
                    SalesRecord = salesRecord, Sellers = sellers
                };
                return(View(viewModel));
            }

            if (id != salesRecord.Id)
            {
                return(RedirectToAction(nameof(Error), new { message = "Id mismatch" }));
            }
            try
            {
                await _salesRecordService.UpdateAsync(salesRecord);

                return(RedirectToAction(nameof(Records)));
            }
            catch (NotFoundException e)
            {
                return(RedirectToAction(nameof(Error), new { message = e.Message }));
            }
            catch (DbConcurrencyException e)
            {
                return(RedirectToAction(nameof(Error), new { message = e.Message }));
            }
        }
        public async Task <IActionResult> Edit(int id, SalesRecord sr)
        {
            if (!ModelState.IsValid)
            {
                var list = await _sellerService.FindAllAsync();

                var viewModel = new SaleRecordViewModel {
                    Seller = list, SalesRecord = sr
                };
                return(View(list));
            }
            if (id != sr.Id)
            {
                return(RedirectToAction(nameof(Error), new { message = "Id not found" }));
            }

            try
            {
                await _salesRecordService.UpdateAsync(sr);

                return(RedirectToAction(nameof(Index)));
            }
            catch (ApplicationException e)
            {
                return(RedirectToAction(nameof(Error), new { message = e.Message }));
            }
        }