rh-activerecord-diff

Simple ActiveRecord diff functionality.

This gem was created to take over and maintain activerecord-diff.

Add this line to your application's Gemfile:

gem 'rh-activerecord-diff'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install rh-activerecord-diff

require 'active_record/diff'

class User < ActiveRecord::Base
  include ActiveRecord::Diff
end

alice = User.create(:name => 'alice', :email_address => 'alice@example.org')

bob = User.create(:name => 'bob', :email_address => 'bob@example.org')

alice.diff?(bob)  # => true

alice.diff(bob)  # => {:name => ['alice', 'bob'], :email_address => ['alice@example.org', 'bob@example.org']}

alice.diff({:name => 'eve'})  # => {:name => ['alice', 'eve']}

By default, ActiveRecord::Base.content_columns is used to decide which attributes to compare. You can include or exclude attributes from this as follows:

class User < ActiveRecord::Base
  diff :include => [:id], :exclude => [:password_hash]
end

Alternatively, you can specify exactly which columns to compare:

class User < ActiveRecord::Base
  diff :id, :name, :email_address
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake 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/hayashima/rh-activerecord-diff. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the CC0 1.0 Universal.

Everyone interacting in the rh-activerecord-diff project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.