Question

我试图将票证表的ID添加到另一个表（TrackTicket）并将其插入到字段（TicketId）中，但出现此错误

错误：EntityFramework.dll中发生了'System.Data.Entity.Infrastructure.DbUpdateException'类型的异常，但未在用户代码中处理

-内部异常错误：插入语句与外键约束\“ FK_dbo.TrackTickets_dbo.Tickets_TicketId \”冲突。数据库\“数据库名称” \“，表\” dbo.Tickets“ \列“ Id”中发生冲突。\该语句已终止

是什么意思？救命！

代码

控制器

_context.Tickets.Add(new Ticket {ClientId = userId , Subject = viewModel.Ticket.Subject, TypeOfTicket = viewModel.Ticket.TypeOfTicket, ConcernedDept = viewModel.Ticket.ConcernedDept, Date = DateTime.Now});

_context.TicketContents.Add(new TicketContent {Subject = viewModel.Ticket.Subject, Content = viewModel.TicketContent.Content});

_context.TrackTickets.Add(new TrackTicket { ClientId = userId,TicketId = viewModel.Ticket.Id  ,StatusHelpDesk = "Received", DateHelpDeskReceived = DateTime.Now });

_context.SaveChanges();

Answer 1

我不完全了解您的方案，但是您正在创建或插入新的票证，并且还在未设置或检索票证ID的情况下创建或插入引用票证的跟踪票证。

此行尚无ID。您可以在此处设置ID，也可以创建变量票证，然后使用该ID链接到TrackTickets。 _context.Tickets.Add（新票证{ClientId = userId，Subject = viewModel.Ticket.Subject，TypeOfTicket = viewModel.Ticket.TypeOfTicket，ConcernedDept = viewModel.Ticket.ConcernedDept，Date = DateTime.Now}）；

添加操作将失败，因为无法将TicketId链接到某些内容（未插入具有该ID的票证。

_context.TrackTickets.Add(new TrackTicket { ClientId = userId, TicketId = viewModel.Ticket.Id, StatusHelpDesk = "Received", DateHelpDeskReceived = DateTime.Now });

如果自动生成ticketId，可以使用以下方法：

var newTicket = new Ticket {ClientId = userId, Subject = viewModel.Ticket.Subject, TypeOfTicket = viewModel.Ticket.TypeOfTicket, ConcernedDept = viewModel.Ticket.ConcernedDept, Date = DateTime.Now}  
_context.Tickets.Add(newTicket);
_context.SaveChanges();

如果现在重用newTicket对象，它将有一个ID。因此，在trackTickets的添加中，使用newTicket的ID

_context.TrackTickets.Add(new TrackTicket { ClientId = userId, TicketId = newTicket.Id, StatusHelpDesk = "Received", DateHelpDeskReceived = DateTime.Now });

如果不自动生成票证ID，则必须在创建票证（添加到上下文）中设置ID：

var newTicket = new Ticket { Id = viewModel.Ticket.Id, ClientId = userId, Subject = viewModel.Ticket.Subject, TypeOfTicket = viewModel.Ticket.TypeOfTicket, ConcernedDept = viewModel.Ticket.ConcernedDept, Date = DateTime.Now}

内部异常错误：INSERT语句与FOREIGN KEY约束冲突

1 个答案: