gistfile1.rb

class Article < ActiveRecord::Base

  acts_as_state_machine :initial => :opened

   state :opened
   state :state2, :enter => Proc.new {|model| puts "entering state 2" }, :after => Proc.new {|model| model.close! } 
   state :state3, :enter => Proc.new {|model| puts "entering state 3" }, :after => Proc.new {|model| model.close! }
   state :state4, :enter => Proc.new {|model| puts "entering state 4" }
   state :closed
   state :returned

   event :close do
     transitions :to => :state2, :from => :opened
     transitions :to => :state3, :from => :state2
     transitions :to => :state4, :from => :state3
     transitions :to => :closed, :from => :state4
   end

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




end