EF generating the wrong fk

Question

I have two poco's

public class Person {
   [Key]
   public virtual int Id { get; set; }
   public virtual int? AtendeeId { get; set; }
   [ForeignKey("Id")]
   public virtual Atendee Atendeed { get; set; }
}

public class Atendee {
   [Key]
   public virtual int Id { get; set; }

   public virtual int PersonId { get; set; }
   public virtual Person Person { get; set; }
}

For some reason this creates a FK from atendee to person using the ID column of atendee instead of personId. What would be the correct way of declaring this?

Here is the FK generated:

ALTER TABLE [dbo].[Atendees]  WITH CHECK ADD  CONSTRAINT [FK_dbo.Atendees_dbo.People_Id] FOREIGN KEY([Id])
REFERENCES [dbo].[People] ([Id])

Answer 1

You only list the 'opposite' foreign key for a collection, ie for a 1-N relation.
You seem to have a 1-1 relation.

//[ForeignKey("Id")]
[ForeignKey("AtendeeId")]  // or just omit this
public virtual Atendee Atendeed { get; set; }

---

public class Person {
   [Key]
   public virtual int Id { get; set; }

   [ForeignKey("Atendeed")]  // refer to the property
   public virtual int? AtendeeId { get; set; }

   public virtual Atendee Atendeed { get; set; }
}

But you should consider using the fluent notation in override OnModelBuilding, that usually gives you more control.