Rails gem to check if an attribute was changed on the last save. Useful in after_save callbacks.
gem install filthy
class Movie < ActiveRecord::Base include Filthy filthy_attributes :title, :director end @movie = Movie.find(1) @movie.title = "28 days later" @movie.title_filthy? => false @movie.save => true @movie.title_filthy? => true @movie.save => true @movie.title_filthy? => false
Filthy is maintained by Mike Taylor and is funded by BookRenter.com. Many of the ideas that have inspired Filthy come from practical usage by the Bookrenter software development team and conversations with Bookrenter developers Andrew Wheeler, Michael Pearce, Philippe Huibonhoa, and Ben Somers.
Copyright (c) 2012 Mike Taylor, Bookrenter.com.