AASM - Ruby state machines
This package contains AASM, a library for adding finite state machines to Ruby classes.
AASM started as the acts_as_state_machine plugin but has evolved into a more generic library that no longer targets only ActiveRecord models.
AASM has the following features:
The latest AASM can currently be pulled from the git repository on github.
A release and a gem are forthcoming.
From GitHub hosted gems
% sudo gem sources -a http://gems.github.com # (you only need to do this once) % sudo gem install rubyist-aasm
Building your own gems
% rake gem % sudo gem install pkg/aasm-0.0.2.gem
Here's a quick example highlighting some of the features.
class Conversation include AASM aasm_initial_state :new aasm_state :new aasm_state :read aasm_state :closed aasm_event :view do transitions :to => :read, :from => [:new] end aasm_event :close do transitions :to => :closed, :from => [:read, :new] end end
Scott Barron <scott at elitists dot net>
Copyright 2006, 2007, 2008 by Scott Barron. Released under an MIT-style license. See the LICENSE file included in the distribution.
This software is provided “as is” and without any express or implied warranties, including, without limitation, the implied warranties of merchantibility and fitness for a particular purpose.