Undo

Wrapper for Undo gem. Observe changes and stores object state before the change.

1. Installation
2. Usage
3. Requirements
4. Contacts
5. Compatibility
6. Contributing
7. Copyright

Add this line to your application's Gemfile:

gem 'undo-wrapper'

And then execute:

$ bundle

Or install it yourself as:

$ gem install undo-wrapper

Undo::wrapper allows to wrap object in decorator:

decorated_object = Undo.wrap object
decorated_object.destroy
Undo.restore decorated_object.uuid

decorated_object is a pure decorator, so it quacks like original object. The Undo will store object state on each hit to mutation methods such as update, delete, destroy. Those methods can be changed either in place or using global configuration.

store_on defines a list of methods which may mutate object state. For each hit to such methods Undo.store will be called.

By default store_on are update, delete, destroy. To append custom store_on use:

Undo::Wrapper.configure do |config|
  config.store_on += [:put, :push, :pop]
end

Undo.wrap object, store_on: [:delete, :destroy]

Or in place:

Undo.wrap object, store_on: :save

Any option, that is not recognized by the Undo as configuration option, will be bypass to the serializer and storage adapter:

Undo.wrap post, include: :comments, expires_in: 1.hour

1. Ruby 1.9 or above
2. Undo gem

Have questions or recommendations? Contact me via alexander.n.paramonov@gmail.com
Found a bug or have enhancement request? You are welcome at Github bugtracker

tested with Ruby

• 2.1
• 2.0
• 1.9.3
• ruby-head
• rbx
• jruby-19mode
• jruby-head

See build history

1. Fork repository
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Copyright © 2014 Alexander Paramonov. Released under the MIT License. See the LICENSE file for further details.