Question

I have a trouble trying to get this working. I have an Item model, and each Item can have other items or nothing.

So is this possible or do I need to do some magic?

Answer 1

You can either use the acts as tree plugin or build it your self:

belongs_to                :parent,
                          :foreign_key => "parent_id",
                          :class_name => "Item"

has_many                  :children,
                          :foreign_key => 'parent_id',
                          :class_name => 'Item',
                          :order => 'created_at ASC',
                          :dependent => :delete_all