nHibernate加入多個表並使用AliasToBean變換器

我有一個非常基本的需求，從數據庫中獲取一些數據並返回一個DTO。我發現，使用nHibernate連接多個表並「投影」到DTO中需要相當多的代碼。看了幾個例子後，大多數沒有工作的東西給我留下了一個空值的DTO，我想到了下面的內容，並想知道nHibernate ninja是否可以告訴我是否有更好的方法。nHibernate加入多個表並使用AliasToBean變換器

public IOpenIdUser GetOpenIdUser(string claimedIdentifier, IOpenIdUser openIdUserDto) 
    { 
     User user = null; 
     OpenIdUser openIdUser = null; 
     Profile profile = null; 
     UserType userType = null; 


     return 
      SessionWrapper.Session.QueryOver(() => user).JoinAlias(() => user.Profiles,() => profile). 
       JoinAlias(() => user.OpenIdUsers,() => openIdUser).JoinAlias(() => user.UserType,() => userType) 
       .Where(() => user.UserName == claimedIdentifier) 
       .SelectList(l => l 
            .Select(x => openIdUser.OpenIdUserId).WithAlias(() => openIdUser.OpenIdUserId) 
            .Select(x => user.UserId).WithAlias(() => openIdUserDto.UserId) 
            .Select(x => openIdUser.OpenIdClaimedIdentifier).WithAlias(
             () => openIdUserDto.ClaimedIdentifier) 
            .Select(x => openIdUser.OpenIdFriendlyIdentifier).WithAlias(
             () => openIdUserDto.FriendlyIdentifier) 
            .Select(x => openIdUser.OpenIdEndPoint).WithAlias(
             () => openIdUserDto.OpenIdEndPoint) 
            .Select(x => user.UserName).WithAlias(() => openIdUserDto.UserName) 
            .Select(x => userType.Type).WithAlias(() => openIdUserDto.UserType) 
            .Select(x => profile.DisplayName).WithAlias(() => openIdUserDto.DisplayName) 
            .Select(x => profile.EmailAddress).WithAlias(() => openIdUserDto.EmailAddress) 
            .Select(x => openIdUser.DateCreated).WithAlias(() => openIdUserDto.DateCreated) 
            .Select(x => openIdUser.LastUpdated).WithAlias(() => openIdUserDto.LastUpdated) 
            .Select(x => openIdUser.UsageCount).WithAlias(() => openIdUserDto.UsageCount) 
       ).TransformUsing(Transformers.AliasToBean<OpenIdUserDto>()).Future<OpenIdUserDto>().Single(); 
    }

此方法位於我的UserRepository中，並由我的UserService調用。請不要說這實際上是有效的，我認爲這對於這樣一個簡單的任務來說是過度的。另外請注意，我是新來的，所以如果這個代碼很糟糕，我提前道歉。

來源

2012-02-10 CrazyCoderz

我想這對某人有效。我得到了一張投票.. W00t！ – CrazyCoderz 2012-02-11 05:00:22