[SQLObject] Relation Attributes

[Jonathon A. <and...@gm...>]

Is it possible to have relation attributes in a RelatedJoin?

For example, I have Items and Groups:

Item
    ID
    Name


Group
    ID
    Name

To put items in groups, you would have an intermediate table:

ItemGroupMap
    item_id
    group_id

Now say I want this group to have order. So, in an RDB I would change
ItemGroupMap to:

ItemGroupMap
    item_id
    group_id
    position
    unique(group_id, position)

Is there a way to have this relationship in sqlobject?

~jonathon