Question

I’m using table splitting to map entities Entity1 and Entity2 to a DB table MyTable.

Is there a way to insert a new row into MyTable by adding an instance of Entity1 (or Entity2) to the context and let EF construct the necessary Insert command. I tried the following, but it throws an exception:

        Entity2 entity = new Entity2();
        context.Entity2.AddObject(entity);

        context.SaveChanges();// UpdateException: Invalid data encountered. A 
                              // required relationship is missing

thank you

Answer 1

You must always construct whole record for the split table so if your Entity1 contains navigation property to Entity2 it must be filled:

Entity1 entity = new Entity1();
entity.Entity2 = new Entity2();
context.Entity1.AddObject(entity);
context.SaveChanges();