Question

我正在使用ASPNET Identity 2.0，需要：

添加一个名为ApplicationUserId [int] clustered index
将dbo.AspNetUsers.Id nvarchar字段从群集更改为非聚簇索引

在我的Models \ IdentityModel.cs中，我添加了：

    public class ApplicationUser: IdentityUser
    {
            [Index(IsClustered = true, IsUnique = true)]
            [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
            public int ApplicationUserId { get; set; }
    }

当然，我知道这会出错，因为我知道Id目前是一个聚集索引。如何更改Id以使默认值不是clusered索引？

基本上我想要的原因是我们的DBA不想使用nvarchar（128）的外键（这是来自AspNetUsers表的GUID）。

或者我只是创建它：

    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int ApplicationUserId { get; set; }

然后在创建表后手动修复索引？

或者我是唯一可以使用integer keys instead of strings的选项吗？

我正在使用.NET 4.5并安装了Identity 2.0 Sample Project

 Install-Package Microsoft.AspNet.Identity.Samples -Pre

提前感谢您的帮助！

Answer 1

我没有将GUID [nvarchar]转换为[int]

而得到了它

基本上我更新了Models \ IdentityModel.cs文件

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int ApplicationUserId { get; set; }

然后我手动更新了表（AspNetUserLogins，AspNetUserClaims和AspNetUserRoles引用了我仍想保持原样的AspNetUsers.Id

begin tran
ALTER TABLE [dbo].[AspNetUserLogins] DROP CONSTRAINT [FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId]
ALTER TABLE [dbo].[AspNetUserClaims] DROP CONSTRAINT [FK_dbo.AspNetUserClaims_dbo.AspNetUsers_UserId]
ALTER TABLE [dbo].[AspNetUserRoles] DROP CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId]
ALTER TABLE dbo.[AspNetUsers] DROP CONSTRAINT [PK_dbo.AspNetUsers]
--Uncomment this line in case you need to modify this table again
--ALTER TABLE dbo.[AspNetUsers] DROP CONSTRAINT [dbo.AspNetUsers_ApplicationUserId]

-- Add the constraints back, but now nonclustered
ALTER TABLE dbo.[AspNetUsers] add constraint [PK_dbo.AspNetUsers] primary key     nonclustered 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]

-- Add the other constraints back
ALTER TABLE [dbo].[AspNetUserLogins]  WITH CHECK ADD CONSTRAINT [FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId] FOREIGN KEY([UserId])
REFERENCES [dbo].[AspNetUsers] ([Id])
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[AspNetUserClaims]  WITH CHECK ADD  CONSTRAINT [FK_dbo.AspNetUserClaims_dbo.AspNetUsers_UserId] FOREIGN KEY([UserId])
REFERENCES [dbo].[AspNetUsers] ([Id])
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[AspNetUserRoles]  WITH CHECK ADD  CONSTRAINT [FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId] FOREIGN KEY([UserId])
REFERENCES [dbo].[AspNetUsers] ([Id])
ON DELETE CASCADE
GO

-- Add NEW constraint with unique clustered
ALTER TABLE dbo.[AspNetUsers] add constraint [dbo.AspNetUsers_ApplicationUserId] unique clustered 
(
[ApplicationUserId]
)
commit tran

当您查看dbo.AspNetUsers的create table脚本时，它现在看起来像这样：

CREATE TABLE [dbo].[AspNetUsers](
    [Id] [nvarchar](128) NOT NULL,
    [ApplicationUserId] [int] IDENTITY(1,1) NOT NULL,
    [Email] [nvarchar](256) NULL,
    [EmailConfirmed] [bit] NOT NULL,
    [PasswordHash] [nvarchar](max) NULL,
    [SecurityStamp] [nvarchar](max) NULL,
    [PhoneNumber] [nvarchar](max) NULL,
    [PhoneNumberConfirmed] [bit] NOT NULL,
    [TwoFactorEnabled] [bit] NOT NULL,
    [LockoutEndDateUtc] [datetime] NULL,
    [LockoutEnabled] [bit] NOT NULL,
    [AccessFailedCount] [int] NOT NULL,
    [UserName] [nvarchar](256) NOT NULL,
 CONSTRAINT [PK_dbo.AspNetUsers] PRIMARY KEY NONCLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY],
 CONSTRAINT [dbo.AspNetUsers_ApplicationUserId] UNIQUE CLUSTERED 
(
    [ApplicationUserId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

ASP.NET标识 - 如何将dbo.AspNetUsers.Id更改为非聚簇索引？

1 个答案: