This acts_as extension provides the capabilities for sorting and reordering a number of objects in a list. The class that has this specified needs to have a position column defined as an integer on the mapped database table.
class TodoList < ActiveRecord::Base has_many :todo_items, :order => "position" end class TodoItem < ActiveRecord::Base belongs_to :todo_list acts_as_list :scope => :todo_list end todo_list.first. todo_list.last.move_higher
Copyright © 2007 David Heinemeier Hansson, released under the MIT license