HasChangelogs

has_changelogs tracks changes on a model and it's associations for applications that need to have change history. The version is however, 0.2.0, so use at your own perril.

Especially a generator for the changelog model is missing - see /spec/fixtures/active_record/changelog.rb for it.

Add this line to your application's Gemfile:

gem 'has_changelogs'

And then execute:

$ bundle

Or install it yourself as:

$ gem install has_changelogs

Given you had a fitting Changelog Model (see ./spec/fixtures/active_record/changelog.rb) you can do the following:

class User < ActiveRecord::Base
  has_changelogs

  def my_condition
    name == "True Condition"
  end
end

class LogEverythingUser < User
  has_changelogs ignore: [:type, :id]
end

class OnlyName < User
  has_changelogs only: :name
end

class IgnoreName < User
  has_changelogs ignore: :name
end

class IfCondition < User
  has_changelogs if: :my_condition
end

class UnlessCondition < User
  has_changelogs unless: :my_condition
end

class WithPassportsUser < LogEverythingUser
  has_many :passports, foreign_key: :user_id
end

class Passport < ActiveRecord::Base
  belongs_to :user, class_name: "WithPassportsUser"
  has_changelogs at: :user
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/bitcrowd/has_changelogs.

The gem is available as open source under the terms of the MIT License.