ttafu_attribute

Update the updated_at field when the specified fields has changed

Add this line to your application's Gemfile:

gem 'ttafu_attribute'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ttafu_attribute

If you want to update updated_at field when User updating name and email field, then you should write like this:

class User < ActiveRecord::Base
  include TtafuAttribute
  ttafu_attribute :name, :email
end