ASP.Net MVC 3 EF4.1代碼優先 - 不支持每種類型的多個對象集

Question

我想使用單元測試的EF 4.1代碼優先模式。我遵循This Post的答案中說明的代碼示例。但是現在我收到一個錯誤，指出「不支持多個對象集每種類型」。我也在使用IoC的最新結構圖。我不知道如何解決這個問題。

支持每種類型的多個對象集不是 。對象集 'MemberTypes'和'MemberTypes'可以 都包含 'SocialSite.Model.Entities.MemberType'類型的實例。

Line 82: public virtual IEnumerable<T> FindAll() 
Line 83: { 
Line 84:  return _dbSet.ToList(); 
Line 85: } 
Line 86: 

[InvalidOperationException: Multiple object sets per type are not supported. The  object sets 'MemberTypes' and 'MemberTypes' can both contain instances of type  'SocialSite.Model.Entities.MemberType'.] 
    System.Data.Entity.Internal.DbSetDiscoveryService.RegisterSets(DbModelBuilder  modelBuilder) +336 
    System.Data.Entity.Internal.LazyInternalContext.CreateModelBuilder() +393 
    System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext  internalContext) +22 
    System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input) +117 
    System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +407 
    System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +17 
    System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +62 
    System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +15 
    System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +40 
    System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +315 
    System.Linq.Enumerable.ToList(IEnumerable`1 source) +58 
    SocialSite.Data.Repositories.Impl.Repository`1.FindAll() in D:\Visual Studio 2010\SocialSite\SocialSite.Data\Repositories\Impl\Repository.cs:84 
    SocialSite.Service.Impl.MemberTypesService.GetMemberTypes() in D:\Visual Studio 2010\SocialSite\SocialSite.Components\Impl\MemberTypesService.cs:23 
    SocialSite.Web.Areas.Admin.Controllers.MemberTypesController.ListMemberTypes() in D:\Visual Studio 2010\SocialSite\SocialSite\Areas\Admin\Controllers\MemberTypesController.cs:44 
    lambda_method(Closure , ControllerBase , Object[]) +62 
    System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17 
    System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27 
    System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263 
    System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19 
    System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191 
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343 
    System.Web.Mvc.Controller.ExecuteCore() +116 
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97 
    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10 
    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37 
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21 
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62 
    System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50 
    System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7 
    System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22 
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60 
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8862381 
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184 

不知道如何格式化堆棧跟蹤比任何bertter。

這裏是有問題的模型。

public class MemberType 
{ 
    [Key] 
    public virtual int Id { get; set; } 

    [StringLengthAttribute(65, ErrorMessage = "Maximum length 65 characters")] 
    public virtual string Name { get; set; } 

    public virtual string Description { get; set; } 

    public virtual bool Registration { get; set; } 

    public virtual bool Enabled { get; set; } 

    [TimestampAttribute] 
    public virtual byte[] Timestamp { get; set; } 

    public virtual bool Activation { get; set; } 

    public virtual Guid RoleId { get; set; } // TODO: this should be a complex type of aspnet_Role or atleaset a foriegn key 

    public virtual bool Searchable { get; set; } 

    public virtual ICollection<MemberTypeProfileFieldGroup> MemberTypeProfileFieldGroups { get; set; } 
} 

Answer 1

例外說，你DbContext（或者也許是從您的上下文中引用的一些類定義DbSet<MemberType> MemberType兩次。每種類型只能有一個定義DbSet。代碼你張貼絕對沒有關係的除外。拋出異常當EF代碼首先探索DbContext並從可用的DbSets