Autofac - 要求されたサービス（lSomeDbContext）が登録されていません

Question

私はプロジェクトに取り組んでおり、OnionWebApiStarterKitをCQRSを学ぶための基礎として使用しています。

public AccountsController(
    IMediator mediator, 
    IApplicationUserManager userManager) 
{ 
    // and so on... 

} 

：上記OnionWebApiStarterKitプロジェクトでWEBAPI StudentsController例のみIMediatorを注入しながら

は、私はユーザーの操作への過度に依存与えられ、また、AccountControllerコンストラクタで私のカスタムIApplicationUserManagerを注入するために容易になるだろうことを決めましたしかし、これは次のエラーを生成します。

"The requested service 'OnionWebApiStarterKit.Data.ISchoolDbContext' has not been registered."

のフルスタックトレースは以下の通りです：

"message": "An error has occurred.", 
    "exceptionMessage": "An error occurred when trying to create a controller of type 'AccountsController'. Make sure that the controller has a parameterless public constructor.", 
    "exceptionType": "System.InvalidOperationException", 
    "stackTrace": " at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.<>c__DisplayClass2.<System.Web.Http.Dispatcher.IHttpControllerActivator.Create>b__0()\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerActivatorTracer.System.Web.Http.Dispatcher.IHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)\r\n at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.<>c__DisplayClass2.<CreateController>b__0()\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerDescriptorTracer.CreateController(HttpRequestMessage request)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()", 
    "innerException": { 
    "message": "An error has occurred.", 
    "exceptionMessage": "The requested service 'OnionWebApiStarterKit.Data.ISchoolDbContext' has not been registered. To avoid this exception, either register a component to provide the service, check for service registration using IsRegistered(), or use the ResolveOptional() method to resolve an optional dependency.", 
    "exceptionType": "Autofac.Core.Registration.ComponentNotRegisteredException", 
    "stackTrace": " at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve(IComponentContext context, Type serviceType, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context)\r\n at OnionWebApiStarterKit.Bootstrapper.IdentityModule.<>c.<Load>b__2_0(IComponentContext b) in C:\\Projects\\OnionWebApiStarterKit\\OnionWebApiStarterKit.Bootstrapper\\App_Start\\IdentityModule.cs:line 33\r\n at Autofac.RegistrationExtensions.<>c__DisplayClass10`1.<Register>b__f(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Builder.RegistrationBuilder.<>c__DisplayClass1`1.<ForDelegate>b__0(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.<Execute>b__0()\r\n at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 creator)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Registration.ExternalRegistrySource.<>c__DisplayClass8.<RegistrationsFor>b__3(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)\r\n at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve(IComponentContext context, Type serviceType, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context)\r\n at OnionWebApiStarterKit.Bootstrapper.IdentityModule.<>c.<Load>b__2_1(IComponentContext b) in C:\\Projects\\OnionWebApiStarterKit\\OnionWebApiStarterKit.Bootstrapper\\App_Start\\IdentityModule.cs:line 37\r\n at Autofac.RegistrationExtensions.<>c__DisplayClass10`1.<Register>b__f(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Builder.RegistrationBuilder.<>c__DisplayClass1`1.<ForDelegate>b__0(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.<Execute>b__0()\r\n at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 creator)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Registration.ExternalRegistrySource.<>c__DisplayClass8.<RegistrationsFor>b__3(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Activators.Reflection.AutowiringParameter.<>c__DisplayClass2.<CanSupplyValue>b__0()\r\n at Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate()\r\n at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.<Execute>b__0()\r\n at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 creator)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Registration.ExternalRegistrySource.<>c__DisplayClass8.<RegistrationsFor>b__3(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Activators.Reflection.AutowiringParameter.<>c__DisplayClass2.<CanSupplyValue>b__0()\r\n at Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate()\r\n at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Registration.ExternalRegistrySource.<>c__DisplayClass8.<RegistrationsFor>b__3(IComponentContext c, IEnumerable`1 p)\r\n at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.InstanceLookup.Execute()\r\n at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.ResolveOperation.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Resolving.ResolveOperation.Execute(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(IComponentRegistration registration, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)\r\n at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.ResolveOptional(IComponentContext context, Type serviceType, IEnumerable`1 parameters)\r\n at Autofac.ResolutionExtensions.ResolveOptional(IComponentContext context, Type serviceType)\r\n at Autofac.Integration.WebApi.AutofacWebApiDependencyScope.GetService(Type serviceType)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, Type controllerType, Func`1& activator)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)" 
    } 

私は私のブートストラップスタートアップクラスからの私の依存関係を登録しています：

IocConfig.RegisterDependencies(app); 

そして、私はそれがブレークポイントを設定することにより打撃を受けるん確認しました。以下は私の登録している：

// Registers our ASP.NET Identity custom classes. 
      builder.RegisterModule(new IdentityModule(Assembly.Load("OnionWebApiStarterKit.Data"), Assembly.Load("OnionWebApiStarterKit.Core"))); 

そして、ここに私のアイデンティティのものが登録されている方法です：

public static void RegisterDependencies(IAppBuilder app) 
     { 
      DbContextScopeExtensionConfig.Setup(); 

      // Get your HttpConfiguration. In OWIN, you'll create one 
      // rather than using GlobalConfiguration. 
      var config = new HttpConfiguration(); 

      // register Auto Mapper 
      AutoMapperConfig.Initialize(); 

      // register api routing. 
      WebApiConfig.Register(config); 

      // Run optional steps, like registering filters, 
      // per-controller-type services, etc. 

      var builder = new ContainerBuilder(); 

      // Register Web API controller in executing assembly. 
       builder.RegisterApiControllers(Assembly.Load("OnionWebApiStarterKit.WebApi")); 

      //Helper nuget for managing the DbContext lifetime in Entity Framework. Please see: http://mehdi.me/ambient-dbcontext-in-ef6/ 
      builder.RegisterType<DbContextScopeFactory>().As<IDbContextScopeFactory>().SingleInstance(); 
      builder.RegisterType<AmbientDbContextLocator>().As<IAmbientDbContextLocator>().SingleInstance(); 

      // Registers our IMediator (abstraction for observer pattern, which lets us use CQRS) 
      builder.RegisterModule(new MediatorModule(Assembly.Load("OnionWebApiStarterKit.Services"))); 

      // Registers our Fluent Validations that we use on our Models 
      builder.RegisterModule(new FluentValidationModule(Assembly.Load("OnionWebApiStarterKit.WebApi"), Assembly.Load("OnionWebApiStarterKit.Services"))); 

      // Registers our AutoMapper Profiles 
      builder.RegisterModule(new AutoMapperModule(Assembly.Load("OnionWebApiStarterKit.WebApi"), Assembly.Load("OnionWebApiStarterKit.Services"))); 

      // Registers our ASP.NET Identity custom classes. 
      builder.RegisterModule(new IdentityModule(Assembly.Load("OnionWebApiStarterKit.Data"), Assembly.Load("OnionWebApiStarterKit.Core"))); 

      // Set the dependency resolver to be Autofac. 
      var container = builder.Build(); 

      // helps view registered autofac dependencies. 
      // container.IsRegistered(); 

      config.DependencyResolver = new AutofacWebApiDependencyResolver(container); 

      // Register the Autofac middleware FIRST, then the Autofac Web API middleware, 
      // and finally the standard Web API middleware. 
      app.UseAutofacMiddleware(container); 
      app.UseAutofacWebApi(config); 
      app.UseCors(CorsOptions.AllowAll); // Enables crossdomain requests 
      app.UseWebApi(config); 

     } 

上記のファイルでは、以下のモジュールがIApplicationUserManagerはの一部であるアイデンティティの登録を、扱います

public IdentityModule(params System.Reflection.Assembly[] assembliesToScan) 
      : base() 
     { 
      _assembliesToScan = assembliesToScan; 
     } 

     protected override void Load(ContainerBuilder builder) 
     { 

       builder.RegisterType(typeof(ApplicationUserManager)).As(typeof(IApplicationUserManager)).InstancePerRequest(); 
       builder.RegisterType(typeof(ApplicationRoleManager)).As(typeof(IApplicationRoleManager)).InstancePerRequest(); 
       builder.RegisterType(typeof(ApplicationIdentityUser)).As(typeof(IUser<int>)).InstancePerRequest(); 


       builder.Register(b => b.Resolve<ISchoolDbContext>() as DbContext).InstancePerRequest(); 

       builder.Register(b => 
       { 
        var manager = IdentityFactory.CreateUserManager(b.Resolve<DbContext>()); 

        if (Startup.DataProtectionProvider != null) 
        { 
         manager.UserTokenProvider = 
          new DataProtectorTokenProvider<ApplicationIdentityUser, int>(
           Startup.DataProtectionProvider.Create("ASP.NET Identity")); 
        } 
        return manager; 
       }).InstancePerRequest(); 

      builder.Register(b => IdentityFactory.CreateRoleManager(b.Resolve<DbContext>())).InstancePerRequest(); 

      builder.Register(b => HttpContext.Current.Request.GetOwinContext().Authentication).InstancePerRequest(); 

     } 

ご覧のとおり、この行にはISchoolDbContextが明示的に登録されています。

builder.Register(b => b.Resolve<ISchoolDbContext>() as DbContext).InstancePerRequest(); 

これはAutofacは、スタックトレースに文句を言うと同じラインである：

at OnionWebApiStarterKit.Bootstrapper.IdentityModule.<>c.b__2_0(IComponentContext b) in C:\Projects\OnionWebApiStarterKit\OnionWebApiStarterKit.Bootstrapper\App_Start\IdentityModule.cs:line 33

私は少しIApplicationUserManagerは私ISchoolDbContextを登録していない私に言っている注入する理由として困惑していますか？

ありがとうございました。

UPDATE

私はIdentityModuleの私渡されたアセンブリをスキャンしていなかったように見えます。 だから、私はそれに応じて自分のコードを更新しました：

// Register our UserManager 
      builder.RegisterAssemblyTypes(_assembliesToScan) 
       .As<IApplicationUserManager>().InstancePerRequest(); 

      //// Register our RoleManager 
      builder.RegisterAssemblyTypes(_assembliesToScan) 
       .As<IApplicationRoleManager>().InstancePerRequest(); 

      builder.RegisterAssemblyTypes(_assembliesToScan) 
       .As<IUser<int>>().InstancePerRequest(); 

Answer 1

私はあなたが永続層またはデータベース操作のための同様のクラスライブラリを持っていると仮定します。 そのアセンブリにすべてのタイプを登録しましたか？次のようなもの：

  var assembly = typeof(DbContextScopeFactory).Assembly; 
      builder.RegisterAssemblyTypes(assembly).AsImplementedInterfaces(); 

      builder.RegisterAssemblyTypes(assembly) 
        .Where(t => t.Name.StartsWith("SomeInterface")) 
        .AsImplementedInterfaces(); 
      builder.RegisterAssemblyTypes(assembly) 
        .Where(t => t.Name.EndsWith("DbContext")) 
        .AsImplementedInterfaces();