[英]EF6 Does not generate foreign key association from database
问题:
我正在尝试使用数据库优先方法创建EF6模型。 简单来说,我有2个表tblUser
和tblMilkMan
,它们在UserID
列上具有外键关系。 但是,当我创建一个新的EDMX图并添加2个表时:
请告诉我我做错了什么!
数据库架构:
表脚本:
CREATE TABLE [dbo].[tblMilkMan]
(
[RecordID] [INT] NOT NULL
IDENTITY(1, 1) ,
[UserID] [INT] NOT NULL ,
[IsMyTurn] [BIT] NOT NULL ,
[RoundRobinOrder] [INT] NOT NULL
)
ON [PRIMARY]
GO
ALTER TABLE [dbo].[tblMilkMan] ADD CONSTRAINT [PK_tblMilkMan] PRIMARY KEY CLUSTERED ([RecordID]) ON [PRIMARY]
GO
ALTER TABLE [dbo].[tblMilkMan] ADD CONSTRAINT [FK__MilkMan__User__UserID] FOREIGN KEY ([UserID]) REFERENCES [dbo].[tblUser] ([UserID]) ON DELETE CASCADE
GO
CREATE TABLE [dbo].[tblUser]
(
[UserID] [INT] NOT NULL
IDENTITY(1, 1) ,
[LogonName] [VARCHAR](20) COLLATE SQL_Latin1_General_CP437_CI_AS
NOT NULL ,
[Client] [CHAR](4) COLLATE SQL_Latin1_General_CP437_CI_AS
NOT NULL ,
[Password] [VARCHAR](20) COLLATE SQL_Latin1_General_CP437_CI_AS
NOT NULL ,
[PasswordExpires] [DATETIME] NULL ,
[PasswordExpiresAfter] [INT] NOT NULL
CONSTRAINT [DF_tblUser_PasswordExpiresAfter] DEFAULT ( 9999 ) ,
[FirstName] [VARCHAR](20) COLLATE SQL_Latin1_General_CP437_CI_AS
NOT NULL ,
[LastName] [VARCHAR](20) COLLATE SQL_Latin1_General_CP437_CI_AS
NOT NULL
)
ON [PRIMARY]
WITH (
DATA_COMPRESSION = ROW)
GO
ALTER TABLE [dbo].[tblUser] ADD CONSTRAINT [PK_tblUser] PRIMARY KEY CLUSTERED ([UserID]) WITH (DATA_COMPRESSION = ROW) ON [PRIMARY]
GO
CREATE UNIQUE NONCLUSTERED INDEX [IX_tblUser] ON [dbo].[tblUser] ([UserID]) WITH (FILLFACTOR=90, DATA_COMPRESSION = ROW) ON [PRIMARY]
GO
EDMX Designer视图:
有关帮助我的相关链接:
环境:
问题是以下几行-
CREATE UNIQUE NONCLUSTERED INDEX [IX_tblUser] ON [dbo].[tblUser] ([UserID])
WITH (FILLFACTOR=90, DATA_COMPRESSION = ROW) ON [PRIMARY]
GO
我不知道在同一列上具有聚集索引和非聚集索引的原因。 常见的最佳做法是创建一个主键作为聚簇索引。 (资源)
如果删除该NONCLUSTERED INDEX ,它将在EDMX中看到该关系。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.