Table-Per-Type and multiple association using same Foreign Key in Entity Framework CodeFirst - entity-framework

Question

I have the following CodeFirst Classes. I am trying to model a TPT structure here. An user can login and access his Individual profile or his many company profiles. Individual and Company have polymorphic association with other tables.
public class LoginDetail
{
public int Id { get; set; }
//Other Properties
public virtual Individual Individual { get; set; }
public virtual ICollection<Company> Companies{ get; set; }
}
public abstract class Profile
{
public int Id { get; set; }
//Other Properties
public virtual int LoginId { get; set; }
public virtual LoginDetail Login{ get; set; }
}
[Table("Individuals")]
public class Individual : Profile
{
//Other Properties
}
[Table("Companies")]
public class Company: Profile
{
//Other Properties
}
This maps to LoginDetails, Profiles, Individuals and Companies Table. Everything works fine but in order to associate one-to-many relation between LoginDeatils and Companies it creates an extra LoginDetail_Id in Companies Table. This breaks other parts of my model. How do i tell entity framework to use LoginId in Profiles Table for both the one-to-one relation between LoginDeatils and Individuals and one-to-may relation between LoginDeatils and Companies

Answer 1

you should use InverseProperty and ForeignKey attribute ,
try this code :
public class LoginDetail
{
public int Id { get; set; }
//Other Properties
public virtual Individual Individual { get; set; }
[InverseProperty("Login")]
public virtual ICollection<Profile> Profiles{ get; set; }
}
public abstract class Profile
{
public int Id { get; set; }
//Other Properties
public virtual int LoginId { get; set; }
[InverseProperty("Profiles")]
[ForeignKey("LoginId")]
public virtual LoginDetail Login{ get; set; }
}