Question

I have a 1-1 relationship between Orders and Contact. i.e. Contact.OrderId references Orders and is also a PK.

So I have an existing Order and I add a new Contact to it like so…

    order.Contact = new Contact() { EmailAddress = "hello" };
    context.Orders.Attach(order);
    context.SaveChanges();

A referential integrity constraint violation occurred: The property values that define the referential constraints are not consistent between principal and dependent objects in the relationship.

So what am I doing wrong?

Answer 1

Just generate your child entity, set its OrderIdReference property and you should be good to go.