Committed Changes

A Ruby on Rails plugin which provides hash with changes committed to the database.

It's useful when you want to trigger a callback depend on changed attributes after data is committed to the database.

Normally you would do that in after_commit callback, the problem is that changes hash is already cleared.

This is where committed_changes hash comes in.

Add this to your Gemfile and run bundle install

gem 'committed_changes'

class Vhost < ActiveRecord::Base
  include CommittedChanges
  after_commit :reconfigure_server, :if => :domains_changed_and_committed?

  def reconfigure_server
    # launch background job
  end
end

foo = Vhost.first
foo.domains = "new.example.com"
foo.save

foo.changes #=> {}
foo.committed_changes #=> {"domains" => ["old.example.com", "new.example.com"]}
foo.domains_changed_and_committed? #=> true

To fetch & test the library for development, do:

$ git clone https://github.com/wijet/committed_changes
$ cd committed_changes
$ bundle

# Preparing test database
$ cd test/dummy && rake db:migrate && rake db:test:prepare
$ cd ../..
# Running tests
$ bundle exec rake test

If you want to contribute, please:

* Fork the project.
* Make your feature addition or bug fix.
* Add tests for it. This is important so I don't break it in a future version unintentionally.
* Send me a pull request on Github.

This project rocks and uses MIT-LICENSE.