state_machine

https://github.com/pluginaweek/state_machine

Ruby

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

StateMachine::Machine#owner_class_ancestor_has_method?

Determines whether there's already a helper method defined within the
given scope.  This is true only if one of the owner's ancestors defines
the method and is further along in the ancestor chain than this
machine's helper module.

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-owner_class_ancestor_has_method--for-pr

# Commit to git

git add lib/state_machine/machine.rbgit commit -m "better docs for StateMachine::Machine#owner_class_ancestor_has_method?"

# 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-owner_class_ancestor_has_method--for-pr

hub pull-request

# Celebrate!