问题描述
我已经为我的数据库创建了一个edmx。在其中Entity框架删除了一个表,而是在两个表之间创建了一个关联,因为它将列名与另一个表中的主键相匹配。我不想要因为这些表之间没有真正的关联。例如:
> SomeTable
- Id int pk
MiddleTable
- SomeTableId int fk
- SomeCode int
其他表
- SomeCode int pk
这是 c c> SomeTable 和 OtherTable 之间的许多由两个集合属性建模:
SomeTable.OtherTables
OtherTable.SomeTables
中间表,连接表并不是真的必要。
对我来说有点令人惊讶,你说两个表之间没有关联,虽然显然在数据库中有外键。从技术上讲,它是一对多的关联。
I've created an edmx for my database. In it Entity framework removed a table and instead created an association between two tables because it matches a column name with the primary key in the other table.
I do not want that as there is no real association between those tables. How can I remove that association and get a class for the middle table instead?
Example:
SomeTable
- Id int pk
MiddleTable
- SomeTableId int fk
- SomeCode int
OtherTable
- SomeCode int pk
It's the MiddleTable which do not get a class.
- Remove one table from the edmx, e.g. OtherTable.
- Update model from database and add MiddleTable.
- Update model from database and add OtherTable.
When I do this with a similar model I end up with an association between SomeTable and MiddleTable and an unassociated OtherTable. Now you can add/remove associations manually as you wish.
It's normal EF behavior not to create a class for the middle table. This is a so-called many to many association between SomeTable and OtherTable which can be modelled by two collection properties:
SomeTable.OtherTables
OtherTable.SomeTables
The middle table, the junction table, is not really necessary.
It's a bit surprising to me that you say that there is no association between the two tables although, apparently, in the database there are foreign keys. Technically, it is a many to many association.
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