gistfile1.txt

  include Newflow
  define_workflow do

    state :draft, :start => true do
      transitions_to :published, :if => lambda { true }
    end

    state :published do
      transitions_to :unpublished , :if => lambda { true }
    end

    state :unpublished, :stop => true
  end

/////

>> l = Link.new
=> #<Link id: nil, title: nil, description: nil, url: nil, created_at: nil, updated_at: nil, photo_file_name: nil, photo_content_type: nil, photo_file_size: nil, photo_updated_at: nil, popular: nil, featured: nil, workflow_state: "draft">
>> l.transition!
=> :unpublished
>> l.current_state = 'draft'
=> "draft"
>> l.transition!
=> :unpublished