【发布时间】：2016-06-08 14:59:35
【问题描述】：
我在我的 ASP.Net MVC 应用程序中使用 EF6。对于特定表，我的视图、更新和删除代码有效，但我的插入会抛出 DbUpdateException。
System.Data.Entity.Infrastructure.DbUpdateException 未被用户代码处理
HResult=-2146233087
消息=无法确定相关操作的有效排序。由于外键约束、模型要求或存储生成的值，可能存在依赖关系。
来源=实体框架
堆栈跟踪：
在 System.Data.Entity.Internal.InternalContext.SaveChanges() 在 SupportDiary.Models.SchedulerRequestService.Insert(WRequestViewModel request) 在 C:\Projects\SupportDiary\SupportDiary\Models\SchedulerRequestService.vb:line 92 在 SupportDiary.Hubs.WRequestHub.Create(WRequestViewModel request) 在 C:\Projects\SupportDiary\SupportDiary\Hubs\WRequestHub.vb:line 37 在 lambda_method（闭包，IHub，对象 []） 在 Microsoft.AspNet.SignalR.Hubs.HubDispatcher.Incoming（IHubIncomingInvokerContext 上下文） 内部异常： H结果=-2146233087 消息=无法确定相关操作的有效排序。由于外键约束、模型要求或存储生成的值，可能存在依赖关系。 来源=实体框架 堆栈跟踪： 在 System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.DependencyOrderingError(IEnumerable1 remainder) at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.ProduceCommands() at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) 在 System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore（SaveOptions 选项，IDbExecutionStrategy executionStrategy，布尔 startLocalTransaction） 在 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult]（Func`1 操作） 在 System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal（SaveOptions 选项，布尔型 executeInExistingTransaction） 在 System.Data.Entity.Internal.InternalContext.SaveChanges() 内部异常：
这是插入和更新的代码...正如我所说的更新有效。
Public Overridable Function Insert(request As WRequestViewModel) As WRequestViewModel
Dim entity As New tWorkRequest()
entity.Start = request.Start
entity.[End] = request.[End]
entity.Title = request.Title
entity.Diary = request.Diary
entity.Team = request.Team
entity.WorkManagerID = request.WorkManagerID
entity.AssigneeID = request.AssigneeID
entity.ChangeRef = request.ChangeRef
entity.Description = request.Description
entity.ImpactedServers = request.ImpactedServers
entity.ImpactedServices = request.ImpactedServices
entity.IsBAU = request.IsBAU
entity.ProjectRef = request.ProjectRef
entity.Notes = request.Notes
entity.IsOOH = request.IsOOH
entity.IsAllDay = request.IsAllDay
entity.RecurrenceRule = request.RecurrenceRule
entity.RecurrenceID = request.RecurrenceID
entity.RecurrenceException = request.RecurrenceException
entity.StartTimezone = request.StartTimezone
entity.EndTimezone = request.EndTimezone
entity.RequestStatus = request.RequestStatus
Using de As New SupportDiaryEntities
de.tWorkRequests.Add(entity)
de.SaveChanges()
request.WRequestID = entity.WRequestID
Return request
End Using
End Function
Public Overridable Sub Update(request As WRequestViewModel)
Using de As New SupportDiaryEntities
Dim entity = de.tWorkRequests.FirstOrDefault(Function(r) r.WRequestID = request.WRequestID)
entity.Start = request.Start
entity.[End] = request.[End]
entity.Title = request.Title
entity.Diary = request.Diary
entity.Team = request.Team
entity.WorkManagerID = request.WorkManagerID
entity.AssigneeID = request.AssigneeID
entity.ChangeRef = request.ChangeRef
entity.Description = request.Description
entity.ImpactedServers = request.ImpactedServers
entity.ImpactedServices = request.ImpactedServices
entity.IsBAU = request.IsBAU
entity.ProjectRef = request.ProjectRef
entity.Notes = request.Notes
entity.IsOOH = request.IsOOH
entity.IsAllDay = request.IsAllDay
entity.RecurrenceRule = request.RecurrenceRule
entity.RecurrenceID = request.RecurrenceID
entity.RecurrenceException = request.RecurrenceException
entity.StartTimezone = request.StartTimezone
entity.EndTimezone = request.EndTimezone
entity.RequestStatus = request.RequestStatus
de.SaveChanges()
End Using
End Sub
如果我在插入代码中钻入实体，它将自动编号 ID 字段 (WRequestId) 设置为 0
我不确定如何解决此问题...在线搜索提供了有关 DatabaseGeneratedOption.Identity 的错误的详细信息，但这看起来像是 EF4 中的错误。但我确实检查了我的 edmx 文件，并且在每个表的所有 ID 字段上都正确设置了此参数。
这是相关表的 EF 自动生成文件...
'------------------------------------------------------------------------------
' <auto-generated>
' This code was generated from a template.
'
' Manual changes to this file may cause unexpected behavior in your application.
' Manual changes to this file will be overwritten if the code is regenerated.
' </auto-generated>
'------------------------------------------------------------------------------
Imports System
Imports System.Collections.Generic
Partial Public Class tWorkRequest
Public Property WRequestID As Integer
Public Property Title As String
Public Property Start As Date
Public Property [End] As Date
Public Property Diary As String
Public Property Team As String
Public Property WorkManagerID As Integer
Public Property AssigneeID As Integer
Public Property ChangeRef As String
Public Property Description As String
Public Property ImpactedServers As String
Public Property ImpactedServices As String
Public Property IsBAU As Boolean
Public Property ProjectRef As String
Public Property Notes As String
Public Property IsOOH As Boolean
Public Property IsAllDay As Boolean
Public Property RecurrenceRule As String
Public Property RecurrenceID As Nullable(Of Integer)
Public Property RecurrenceException As String
Public Property StartTimezone As String
Public Property EndTimezone As String
Public Property RequestStatus As Integer
Public Overridable Property tWorkRequests1 As ICollection(Of tWorkRequest) = New HashSet(Of tWorkRequest)
Public Overridable Property tWorkRequest1 As tWorkRequest
End Class
大家有什么建议吗？
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