giraffesoft-dirty_callbacks

= Dirty Callbacks

Dirty callbacks is an active record plugin that adds some callbacks for tracking changes to fields.

Currently, it adds two types of callbacks:

before_field_changes_on_update & after_field_changed_on_update

This allows you to hook a callback in to the save cycle that only gets called if a particular field is changed in the save.

This is especially useful in conjunction with my {observational}[http://github.com/giraffesoft/observational] plugin.

== Installation

sudo gem install giraffesoft-dirty_callbacks

== Usage

To get dirty callbacks, you need to include the module in the model you want to use it in.

Then, just declare the callbacks as normal:

class User < ActiveRecord::BAse include DirtyCallbacks

before_email_changes_on_update :do_stuff

protected
def do_stuff
  puts email_was
  puts email
end

end

== Copyright

Copyright (c) 2009 James Golick. See LICENSE for details.