在身份2中擴展IdentityUserRole的PrimaryKey

Question

是否可以通過附加列擴展ApplicationUserRole的主鍵？

默認情況下，有兩列定義為主鍵： UserId和RoleId

這是默認實現

public partial class ApplicationUserRole : IdentityUserRole<string>
{
    public virtual ApplicationUser User { get; set; }
    public virtual ApplicationRole Role { get; set; }
}

public class IdentityUserRole<TKey>
{
    public IdentityUserRole();

    // Summary:
    //     RoleId for the role
    public virtual TKey RoleId { get; set; }
    //
    // Summary:
    //     UserId for the user that is in the role
    public virtual TKey UserId { get; set; }
}

和數據庫中的表看起來像

CREATE TABLE [dbo].[AspNetUserRoles](
    [UserId] [nvarchar](128) NOT NULL,
    [RoleId] [nvarchar](128) NOT NULL,
 CONSTRAINT [PK_dbo.AspNetUserRoles] PRIMARY KEY CLUSTERED 
(
    [UserId] ASC,
    [RoleId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

但我還需要更多！ :)我的意思是我希望我的模型看起來像

public partial class ApplicationUserRole : IdentityUserRole<string>
{

    public Guid ServiceId { get; set; }

    public virtual ApplicationUser User { get; set; }
    public virtual ApplicationRole Role { get; set; }
    public virtual Service Service { get; set; }

}

我無法理解如何正確使用數據注釋或流利的api。 我都嘗試了兩次都沒有成功。 看來遷移引擎會忽略該模型的任何主鍵更改。 至少當我添加注釋或流利的api方法時，遷移引擎會生成空的遷移腳本。

我剛剛添加了serviceId屬性，我的表現在看起來像

CREATE TABLE [dbo].[AspNetUserRoles](
    [UserId] [nvarchar](128) NOT NULL,
    [RoleId] [nvarchar](128) NOT NULL,
    [ServiceId] [uniqueidentifier] NOT NULL,
 CONSTRAINT [PK_dbo.AspNetUserRoles] PRIMARY KEY CLUSTERED 
(
    [UserId] ASC,
    [RoleId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

當我嘗試通過注釋或流暢的api遷移腳本應用關鍵更改時，

public partial class rolesmigrate02 : DbMigration
{
    public override void Up()
    {
    }

    public override void Down()
    {
    }
}

流利的api：

modelBuilder.Entity<ApplicationUserRole>().HasKey(hk => new { hk.UserId, hk.RoleId, hk.ServiceId});

注釋

public partial class ApplicationUserRole : IdentityUserRole<string>
{
    [Key, Column(Order = 0)]
    public override string UserId { get; set; }
    [Key, Column(Order = 1)]
    public override string RoleId { get; set; }
    [Key, Column(Order = 2)]
    public Guid ServiceId { get; set; }

    public virtual ApplicationUser User { get; set; }
    public virtual ApplicationRole Role { get; set; }
    public virtual Service Service { get; set; }
}

我可以在數據庫中手動進行更改，但我懷疑
我的錯誤在哪里？ 為什么我不能通過代碼優先遷移來擴展此模型？

Answer 1

花了一些時間后，我在StackOverflow上找到了有關Sam 2的帖子

關鍵是在base.OnModelCreating(modelBuilder)

如果我們要重新應用或修改預定義的身份2映射，則應在base.OnModelCreating之后進行。

所以流利的api應該看起來像

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        // usualy i put this line to the end of this method but it should be before
        base.OnModelCreating(modelBuilder);

        modelBuilder.Entity<ApplicationUserRole>().HasKey(hk => new { hk.UserId, hk.RoleId, hk.ServiceId});
    }