使用实体框架将实体分成2个表

Question

I have 2 tables in my database (Oracle) which I would like to merge into one entity. I'm using Entity Framework 4.1 code first approach (with existing database) so everything works fine.

The tables structure:

Table Document_Metadata:

Item       NUMBER(2)   PK
Version    NUMBER(2)   PK 
DocDate    DATE        PK
RepType    NUMBER(2)   PK
ValueType  NUMBER(2)   PK
DocId      NUMBER(5)   NOT NULL FK -> Document table
User       VARCHAR2(5) NOT NULL
RowVersion DATE        NOT NULL

Table Document:

ID         NUMBER(5)   PK
Doc        LONGRAW     
User       VARCHAR2(5) NOT NULL
RowVersion DATE        NOT NULL

Is there a way to accomplish that, and if so how would I do that?

Thanks in advanced.

Answer 1

I don't think you can do that. If this is "one to one" relation, maybe you could go with table per type inheritance, and inherit Document_Metadata class from Document class. So you would have one entity object for both tables. But for that to work DocID would have to be PK in Document_Metadata and I think that primary key column names for both tables would have to be same (rename ID to DocID in Document table). But that requires changes in your database model.