EF PK FK映射没有标量PK属性

Question

Is it posible to define a compound foreign primary key without defining scalar properties?

public class A 
{
  public virtual int AID { get; set; }
}

public class B
{
  public virtual int BID { get; set; }
}

public class CompoundKeyClass
{
  public virtual A AObject { get; set; }
  public virtual B BObject { get; set; }
}

How can I make properties AObject and BObject the compound PK of CompoundKeyClass without defining the scalar ID properties of for A and B types using the FluentAPI?

Answer 1

You can't. Both AID and BID must be in your CompoundKeyClass mapped as complex primary key and each of them must be mapped as foreign key to related table.

Answer 2

I suspect you can't; the closest I can find to documentation on this is this :

KeyAttribute

KeyAttribute is used to specify that a property/column is part of the primary key of the entity and applies to scalar properties only.

You should, however, be able to name the foreign key properties "_AID" and "_BID", and/or mark them as [Browsable(false)] . This should ensure you cannot use or even see them accidentally.