state_machine

https://github.com/pluginaweek/state_machine

Ruby

Adds support for creating state machines for attributes on any Ruby class

StateMachine::Integrations::Base::ClassMethods#version

Creates a new version override for an integration.  When this
integration is activated, each version that is marked as active will
also extend the integration.

== Example

  module StateMachine
    module Integrations
      module ORMLibrary
        version '0.2.x - 0.3.x' do
          def self.active?
            ::ORMLibrary::VERSION >= '0.2.0' && ::ORMLibrary::VERSION < '0.4.0'
          end
          
          def invalidate(object, attribute, message, values = [])
            # Override here...
          end
        end
      end
    end
  end

In the above example, a version override is defined for the ORMLibrary
integration when the version is between 0.2.x and 0.3.x.

Source | Google | Stack overflow

Edit

git clone [email protected]:pluginaweek/state_machine.git

cd state_machine

open lib/state_machine/integrations/base.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-StateMachine--Integrations--Base--ClassMethods-version-for-pr

# Commit to git

git add lib/state_machine/integrations/base.rbgit commit -m "better docs for StateMachine::Integrations::Base::ClassMethods#version"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-StateMachine--Integrations--Base--ClassMethods-version-for-pr

hub pull-request

# Celebrate!