FluentNhibernate Mapping: Bidirectional one-to-many on same entity (Tree Mapping)

Question

Hi,

I want a bidirectional mapping in one class, in which the child can choose its parent (and save it to the database).

How would I model that?

This is what I have:

public class MyNodeMap : ClassMap<MyNode>
{   
    public MyNodeMap ()
    {
        Table("myTreeTable");
        Id(x => x.Id).Column("NotParentId").GeneratedBy.Identity();

        References(x => x.Parent).Column("ParentId");
        HasMany(x => x.Children).KeyColumn("ParentId").Inverse();
    }
}

But it does not work.

When I change the Parent-Property of a MyNode object and call Session.SaveOrUpdate, it does not persist the modified ParentId to the database.

Thanks to anyone reading this post.