Question

我正在尝试映射这些实体消息表字段是Id生成的Id，SentFrom int，sentTo int 其中Sentfrom和sentTo链接到users表我也有一个链接表带有userId和MessageId的MessageUser表

    CREATE TABLE [dbo].[MessageUser](
 [MessageId] [int] NOT NULL,
 [UserId] [int] NOT NULL,
 CONSTRAINT [PK_MessageUser] PRIMARY KEY CLUSTERED 
(
 [MessageId] ASC,
 [UserId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[MessageUser]  WITH CHECK ADD  CONSTRAINT [FK_MessageUser_Messages] FOREIGN KEY([MessageId])
REFERENCES [dbo].[Messages] ([Id])
GO
ALTER TABLE [dbo].[MessageUser] CHECK CONSTRAINT [FK_MessageUser_Messages]
GO
ALTER TABLE [dbo].[MessageUser]  WITH CHECK ADD  CONSTRAINT [FK_MessageUser_Users] FOREIGN KEY([UserId])
REFERENCES [dbo].[Users] ([Id])
GO
ALTER TABLE [dbo].[MessageUser] CHECK CONSTRAINT [FK_MessageUser_Users]
GO

我认为数据库设计还可以，但我无法找出映射实体的最佳方法我的最终目标是能够使用用户和消息实体获取消息sentTo和消息发送。任何想法如何实现这一目标。映射类看起来像

public MessageMap()
        {
            Table("Messages");
            Id(x => x.Id).GeneratedBy.Identity();
            Map(x => x.Title);
            Map(x => x.Body);
            References(x => x.Recipient).Column("SentTo").Column("Id");//.Cascade.All();
            References(x => x.Sender).Column("SentFrom").Column("Id");//.Cascade.All();
        }

EDIT 这似乎无需使用额外的MessageUser表

  public MessageMap()
        {
            Table("Messages");
            Id(x => x.Id).GeneratedBy.Identity();
            Map(x => x.Title);
            Map(x => x.Body);

            References(x => x.Recipient).Column("SentTo").ForeignKey("Id").Cascade.All();
            References(x => x.Sender).Column("SentFrom").ForeignKey("Id").Cascade.All();
        }

由于

流利的nhibernate manytomany映射

0 个答案: