Question

[编辑]：该应用程序在我的本地运行正常但不会在AppHarbor中运行。在我的网站的初始加载，我得到这个error mentioned in another question，如果我重新加载页面，那么我会得到下面提到的错误。正如appharbor的管理员所说，他们正在研究新文物和ninject的问题。但我不太确定我的第二个错误是否与appharbor的新遗物问题有关。 Devtalk.EF.CodeFirst.DontDropDbJustCreateTablesIfModelChanged能否正常使用EF 4.3？我只是等待他们的更新？

[InvalidOperationException: The object cannot be detached because it is not attached to the ObjectStateManager.]
   at System.Data.Objects.ObjectContext.Detach(Object entity, EntitySet expectedEntitySet)
   at System.Data.Objects.ObjectContext.Detach(Object entity)
   at Devtalk.EF.CodeFirst.DontDropDbJustCreateTablesIfModelChanged`1.SaveModelHashToDatabase(T context, String modelHash, ObjectContext objectContext)
   at Devtalk.EF.CodeFirst.DontDropDbJustCreateTablesIfModelChanged`1.InitializeDatabase(T context)
   at System.Data.Entity.Database.<>c__DisplayClass2`1.<SetInitializerInternal>b__0(DbContext c)
   at System.Data.Entity.Internal.InternalContext.<>c__DisplayClass8.<PerformDatabaseInitialization>b__6()
   at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
   at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()
   at System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c)
   at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()
   at System.Data.Entity.Internal.InternalContext.Initialize()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
   at System.Linq.Queryable.Where[TSource](IQueryable`1 source, Expression`1 predicate)
   at Core.Repository`2.Find(Expression`1 predicate) in d:\temp\2otuf0q2.xtn\input\Domain\Core\Repository.cs:line 52
   at Data.RegistrantRepository.GetAllRegistrant() in d:\temp\2otuf0q2.xtn\input\Data\Data\RegistrantRepository.cs:line 20
   at IPOD.Controllers.HomeController.Index() in d:\temp\2otuf0q2.xtn\input\IPOD\Controllers\HomeController.cs:line 28
   at lambda_method(Closure , ControllerBase , Object[] )
   at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
   at System.Web.Mvc.Controller.ExecuteCore()
   at System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext)
   at System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext)
   at System.Web.Mvc.MvcHandler.<>c__DisplayClass6.<>c__DisplayClassb.<BeginProcessRequest>b__5()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
   at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult](IAsyncResult asyncResult, Object tag)
   at System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag)
   at System.Web.Mvc.MvcHandler.<>c__DisplayClasse.<EndProcessRequest>b__d()
   at System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f)
   at System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action)
   at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Answer 1

对我而言，初始化程序似乎正在尝试更新EdmMetadata表 - 至少这是我推断的内容：

Devtalk.EF.CodeFirst.DontDropDbJustCreateTablesIfModelChanged`1.SaveModelHashToDatabase(T context, String modelHash, ObjectContext objectContext)

在EF 4.3中，将不会创建EdmMeatadata表（如果您的数据库中有一个并且模型没有更改 - 即从4.1 / 4.2升级到4.3+时，将使用它 - 有关详细信息，请参阅：{ {3}}）

在4.3世界中，如果模型发生更改并且您需要更新数据库但又不想实际删除并重新创建数据库，则需要使用迁移。看看这个步行：http://blog.oneunicorn.com/2012/01/13/ef-4-3-beta-1-what-happened-to-that-edmmetadata-table/

使用CodeFirst.DontDropDbJustCreateTablesIfModelChanged导致附件问题到EF 4.3中的ObjectStateManager

1 个答案: