c＃Fluent nHibernate主鍵是外鍵

Question

我的數據庫布局如下所示：

Users
------------
|UserId    | <-PK
|FirstName |
|LastName  |
|MiddleName|
|Email     |
------------

Admins
------------
|UserId    | <-PK/FK to Users
------------

我只是希望能夠在Admins表中輸入唯一ID來指定該用戶是否為Admin。

這是我的Fluent nHibernate代碼：

public class Users
{
    public virtual string UserId { get; set; }
    public virtual string FirstName { get; set; }
    ....
}

public class UserMappings : ClassMap<Users>
{
    public UserMappings()
    {
        Id(x => x.UserId).Column("UserId").Not.Nullable();

        Map(x => x.FirstName).Column("FirstName").Not.Nullable();
        Map(x => x.MiddleName).Column("MiddleName").Nullable();
        ....
    }
}

public class Admins
{
    public virtual Users User { get; set; }
}

public class AdminMappings : ClassMap<Admins>
{
    public AdminMappings()
    {
        Id(x => x.User).GeneratedBy.Foreign("Users");

        HasOne(x => x.User).Constrained();
    }
}

不幸的是，當我跑步時，我收到此錯誤：

Could not determine type for: SMAC.Users, SMAC, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null, for columns: NHibernate.Mapping.Column(User)

我想要的是，如果我這樣做：

var admin;
admin.user <= instance of user to get name, email, etc...

我將如何實現這一目標？

編輯：我添加了這個，雖然我不知道它是否理想，但它讓它工作了：

public AdminMappings()
{
    Id(x => x.UserId).Column("UserId");
    HasOne(x => x.User).Constrained();
}

public UserMappings()
{
    Id(x => x.UserId).Column("UserId").Not.Nullable();
    Map(x => x.FirstName).Column("FirstName").Not.Nullable();
    Map(x => x.MiddleName).Column("MiddleName").Nullable();
    ...
    HasOne(x => x.Admin).Cascade.All();
}

public class Admins
{
    public virtual string UserId { get; set; }

    public virtual Users User { get; set; }
}

public class Users
{
    public virtual string UserId { get; set; }
    public virtual string FirstName { get; set; }
    ....
    public virtual Admins Admin { get; set; }
}

唯一需要注意的是，我必須實際設置UserId和User才能保存Admin記錄，而不僅僅是UserId，並讓它自動為我提取用戶記錄。

Answer 1

NHibernate可以在主鍵中處理FK

public class AdminMappings : ClassMap<Admins>
{
    public AdminMappings()
    {
        CompositeId().KeyReference(x => x.User, "UserId");
    }
}

不要忘記在Admin上適當地使用equals和gethashcode來使用User.Id