NHibernate無效索引異常

Question

我正在開發一個ASP.NET MVC應用程序，其中我使用NHibernate和Ninject。

問題是由以下控制器引起的：

public class ShoppingCartController : Controller 
{ 
    private readonly Data.Infrastructure.IShoppingCartRepository _shoppingCartRepository; 
    private readonly Data.Infrastructure.IShopItemRepository _shopItemRepository; 

    public ShoppingCartController(Data.Infrastructure.IShoppingCartRepository shoppingCartController, 
     Data.Infrastructure.IShopItemRepository shopItemRepository) 
    { 
     _shoppingCartRepository = shoppingCartController; 
     _shopItemRepository = shopItemRepository; 
    } 

    public ActionResult AddToShoppingCart(FormCollection formCollection) 
    { 
     var cartItem = new Data.Models.ShoppingCartItem(); 
     cartItem.ChangeDate = DateTime.Now; 
     cartItem.ShopItem = _shopItemRepository.GetShopItem(SessionData.Data.Info, Convert.ToInt32(formCollection["shopItemId"])); 
     //IF I DONT´T CALL THE METHOD ABOVE, AddToCart works 

     _shoppingCartRepository.AddToCart(SessionData.Data.Info, cartItem); 
     //BUT IF I CALL THE GetShopItem METHOD I GET THE EXCEPTION HERE! 
     return RedirectToAction("Index", "Shop"); 
    } 
} 

我知道大多數這種異常是由錯誤造成映射的時間，但I'm敢肯定，我的映射是正確的，因爲AddToCart法如果我不叫GetShopItem工程...

因此，這裏是ShopItemRepository的代碼：

public class ShopItemRepository : ReadOnlyRepository<ShopItem>, IShopItemRepository 
{ 
    public ShopItemRepository(IUnitOfWork uow) : base(uow) 
    { 

    } 

    public ShopItem GetShopItem(SessionParams param, int id) 
    { 
     return CurrentSession.QueryOver<ShopItem>() 
         .Where(x => x.ProcessId == param.ProcessId && 
            x.CatalogueId == param.CatalogueId && 
            x.Id == id) 
         .SingleOrDefault(); 
    } 

    public IList<ShopItem> GetShopItems(SessionParams param) 
    { 
     return CurrentSession.GetNamedQuery("GetShopItems") 
         .SetParameter("requestor_id", param.RequestorId) 
         .SetParameter("recipient_id", param.RecipientId) 
         .SetParameter("process_id", param.ProcessId) 
         .SetParameter("catalogue_id", param.CatalogueId) 
         .List<ShopItem>(); 
    } 
} 

而且我的UnitOfWork的最終代碼（基本上是我只是一個包裝的會議，因爲我不希望引用NHibernate的在我的MVC項目）

public class UnitOfWork : IUnitOfWork, IDisposable 
{ 
    private NHibernate.ISession _currentSession; 
    public NHibernate.ISession CurrentSession 
    { 
     get 
     { 
      if(_currentSession == null) 
      { 
       _currentSession = SessionFactoryWrapper.SessionFactory.OpenSession(); 
      } 
      return _currentSession; 
     } 
    } 

    public void Dispose() 
    { 
     if(_currentSession != null) 
     { 
      _currentSession.Close(); 
      _currentSession.Dispose(); 
      _currentSession = null; 
     } 
     GC.SuppressFinalize(this); 
    } 
} 

附錄：
我NinjectWebCommon類

public static class NinjectWebCommon 
{ 
    private static readonly Bootstrapper bootstrapper = new Bootstrapper(); 

    /// <summary> 
    /// Starts the application 
    /// </summary> 
    public static void Start() 
    { 
     DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule)); 
     DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule)); 
     bootstrapper.Initialize(CreateKernel); 
    } 

    /// <summary> 
    /// Stops the application. 
    /// </summary> 
    public static void Stop() 
    { 
     bootstrapper.ShutDown(); 
    } 

    /// <summary> 
    /// Creates the kernel that will manage your application. 
    /// </summary> 
    /// <returns>The created kernel.</returns> 
    private static IKernel CreateKernel() 
    { 
     var kernel = new StandardKernel(); 
     kernel.Bind<Func<IKernel>>().ToMethod(ctx =>() => new Bootstrapper().Kernel); 
     kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>(); 

     RegisterServices(kernel); 
     return kernel; 
    } 

    /// <summary> 
    /// Load your modules or register your services here! 
    /// </summary> 
    /// <param name="kernel">The kernel.</param> 
    private static void RegisterServices(IKernel kernel) 
    { 
     kernel.Bind<IUnitOfWork>().To<UnitOfWork>().InRequestScope(); 

     kernel.Bind<Data.Infrastructure.ICatalogueRepository>().To<Data.Repositories.CatalogueRepository>(); 
     kernel.Bind<Data.Infrastructure.ICategoryRepository>().To<Data.Repositories.CategoryRepository>(); 
     kernel.Bind<Data.Infrastructure.IContactRepository>().To<Data.Repositories.ContactRepository>(); 
     kernel.Bind<Data.Infrastructure.IProcessRepository>().To<Data.Repositories.ProcessRepository>(); 
     kernel.Bind<Data.Infrastructure.IShopItemRepository>().To<Data.Repositories.ShopItemRepository>(); 
     kernel.Bind<Data.Infrastructure.IShoppingCartRepository>().To<Data.Repositories.ShoppingCartRepository>(); 
    }   
} 

IUnitOfWork設置爲RequestScope如此在ShoppingCartController的情況下，這兩個存儲庫共享相同的UOW權限？

也許這可能會導致問題？

Answer 1

你確定這不是由錯誤的映射造成的嗎？我有同樣的問題，並可以通過再次檢查我的映射來解決它！