相关疑难解决方法(0)

我遇到过一个场景,其中Entity Framework 4.0没有生成与具有唯一索引的表支持的实体的关联,我想知道为什么.

基本设置是这样的:假设我在SQL Server 2008 R2中有两个表和一个外键关系:

CREATE TABLE [dbo].[User](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [GroupId] [int] NULL,
 CONSTRAINT [PK_User] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[Group](
[Id] [int] IDENTITY(1,1) NOT NULL,
 CONSTRAINT [PK_Group] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF,
    ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = …