Working With Rails

Acts As State Machine

= Acts As State Machine

This act gives an Active Record model the ability to act as a finite state machine (FSM).

Acquire via subversion at:

http://elitists.textdriven.com/svn/plugins/acts_as_state_machine/trunk

If prompted, use the user/pass anonymous/anonymous.

== Example

class Order < ActiveRecord::Base
  acts_as_state_machine :initial => :opened
end

state :opened
state :closed, :enter => Proc.new {|o| Mailer.send_notice(o)}
state :returned

event :close do
  transitions :to => :closed, :from => :opened
end

event :return do
  transitions :to => :returned, :from => :closed
end

o = Order.create
o.close! # notice is sent by mailer
o.return!

NOTE: This description has been extracted from the Plugin README and so the formatting may need updating to make browser friendly