state_machine

https://github.com/pluginaweek/state_machine

Ruby

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

StateMachine::Machine#callbacks

The callbacks to invoke before/after a transition is performed

Maps :before => callbacks and :after => callbacks

Source | Google | Stack overflow

Edit

git clone [email protected]:pluginaweek/state_machine.git
cd state_machine
open lib/state_machine/machine.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-StateMachine--Machine-callbacks-for-pr

# Commit to git
git add lib/state_machine/machine.rbgit commit -m "better docs for StateMachine::Machine#callbacks"

# 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--Machine-callbacks-for-pr
hub pull-request

# Celebrate!