nhibernate: using parts of the compositeId in a ManyToOne Property

Question

I have a tablestructure like this:

Table entity
(
    otherEntity_id  int  // primarykey
    id              int  // primarykey

    parent_id       int
)


        

Answer 1

I still haven't found a solution and mapped changed my model to:

public class Entity
{
    public OtherEntity Other { get; set; }
    // simple int to discriminate different Entity for the same OtherEntity
    public int Id { get; set; }

    public int ParentId { get; set; }
}

Answer 2

If you are referencing the same column above twice (otherEntity_id) I've seen mappings like this to avoid this sort of error:

References(e => e.Parent).Columns("otherEntity_id", "parent_id")
    .Not.Update()
    .Not.Insert();

Also when you are running into a problem it is always helpful to show the full error message you are running into.