RailsTips.org

Richard Livsey has just built functionality on top of Technoweenie’s acts_as_versioned plugin to also version associations.

class Article < ActiveRecord::Base
  has_many :images
  has_and_belongs_to_many :categories

  acts_as_versioned
  acts_as_versioned_association :images
  acts_as_versioned_association :categories
end

Now, not only is the article versioned but also the associations. I can’t quite think of something I would use it on yet, but it is a pretty cool idea. You can read more on Richard’s blog.