How to get Entity Framework Code First and nullable foreign key properties to work?

Question

I\'m trying to create a simple entity framework code first application. I have these classes:

public class User
{
    public int UserId { get; set; }

    pu         


        

Answer 1

You will need a mapping rule like this:

modelBuilder
    .Entity()
    .HasOptional(u => u.ActivationTicket)
    .WithOptionalPrincipal();

This will give you an ActivationTickets table with a UserId that is nullable.