Dealing with AR pollution

state_spec.rb

module CoderetreatLive::Coderetreats
# this Coderetreat gets loaded instead of the AR
  class Coderetreat
    include States
  end
  describe "The states a coderetreat can be in" do
    let(:retreat) { Coderetreat.new }
    example "Going through the day of a coderetreat" do
      retreat.should be_not_started
      retreat.start!
      retreat.should be_started
      retreat.do_introduction!
      retreat.should be_doing_introduction
      retreat.start_session!
      retreat.should be_in_session
      retreat.stop_session!
      retreat.should be_on_break
      retreat.go_to_lunch!
      retreat.should be_on_lunch
      retreat.do_closing_circle!
      retreat.should be_in_closing_circle
      retreat.end_coderetreat!
      retreat.should be_finished
    end
  end
end

states.rb

require 'state_machine'
module CoderetreatLive
  module Coderetreats
    module States
      TRANSITIONS = {
        not_started: :not_started,
        start: :started,
        do_introduction: :doing_introduction,
        start_session: :in_session,
        stop_session: :on_break,
        go_to_lunch: :on_lunch,
        do_closing_circle: :in_closing_circle,
        end_coderetreat: :finished
      }
      def self.state_names
        TRANSITIONS.values
      end
      def self.included(klass, *_)
        klass.state_machine :state, initial: :not_started do
          TRANSITIONS.each_pair do |event_name, ending_state|
            event event_name do
              transition all => ending_state
            end
          end
        end
      end
    end
  end
end

This doesn't show the pollution exactly and could be dealt with in alternate ways. However, I assume people can extrapolate how this works when you would load up the Coderetreat AR model.