ActsAsList

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.

Install

Specify it in your Rails config.

config.gem 'ryanb-acts-as-list', :lib => 'acts_as_list', :source => 'gems.github.com'

Then install it.

rake gems:install

Example

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.move_to_bottom
todo_list.last.move_higher

Copyright © 2007 David Heinemeier Hansson, released under the MIT license