public IActionResult ReturnNoCustomerKnown(Guid id) { var orders = _orderService.All(); foreach (var order in orders) { var orderLines = _orderLineService.FindByOrderId(order.Id); foreach (var orderLine in orderLines) { if (!orderLine.ReturnedAt.HasValue && orderLine.ArticleId == id) { if (!_orderLineService.Return(orderLine.Id, DateTime.Now)) { CheckInViewModel.Error = $"Het artikel '{orderLine.ProductName} [{orderLine.ArticleId}]' kon niet worden ingechecked"; } return(RedirectToAction("CheckIn")); } } } return(RedirectToAction("CheckIn")); }