How can I get BelongsTo to automatically update for transient object in Castle ActiveRecord

Question

Hi,

I've just switched to Castle.ActiveRecord 2.1.0 and I'm puzzled about a behaviour change.

I used to be able to update a child's parent-reference by calling Update on the parent and then refreshing the child.

Now that doesn't work anymore, am I missing something completely? Or was I doing it wrong from the beginning?

The code below used to pass but now doesn't.

If I put a SessionScope.Current.Flush() after the email.Update() it works, but I would like to understand why, plus there are sooo many places to change if I cannot do it in another way.

And btw, I'm switching from 0.0.1.3...

using (new SessionScope())
{
  Email email = new Email();
  email.Save();

  Attachment a = new Attachment();
  email.Attachments.Add(a);
  email.Update();

  a.Refresh();

  //the important part
  Assert.That(a.Email, Is.Not.Null);
}

The classes are:

[ActiveRecord("emails")]
public class Email : ActiveRecordBase<Email>
{
    [HasMany(typeof(Attachment), 
       Cascade = ManyRelationCascadeEnum.AllDeleteOrphan, 
       Lazy = true)]
    public IList Attachment { get; set; }
}

and

[ActiveRecord("attachments")]
public class Attachment : ActiveRecordBase<Attachment>
{
   [BelongsTo("email")]
   public virtual Email Email { get; set; }
}

Thank you for replying!