search for: gb_entry_pag

hello there, i have a model that uses acts_as_tree: >class GbEntry < ActiveRecord::Base > acts_as_tree :order => ''created_at DESC'' >end and i want it to paginate, including all children to avoid unnecessary db queries: > @gb_entry_pages, @gb_entries = > paginate :gb_entries, :per_page => 15, :order => ''created_at DESC'', :include => :children when i run that, i get the followin error: ActiveRecord::StatementInvalid (Mysql::Error: #23000Column ''created_at'' in order clause is a...