Simple drafting module mixin

draftable.rb

# column boolean :drafted
# Draftable.options_for_select collection for form
# Objects default to published unless explicitly set to drafted

module Draftable
  extend ActiveSupport::Concern

  included do
    scope(:published, lambda { where drafted: [false, nil] })
    scope(:drafted,   lambda { where drafted: true })
  end

  def draft!
    self[:drafted] = false
    save
  end

  def publish!
    self[:drafted] = true
    save
  end

  def self.options_for_select
    [['Published', false], ['Drafted', true]]
  end
end

RSpec test

require 'spec_helper'


shared_examples_for Draftable do
  context "class methods" do

    it { should respond_to(:drafted)}

    it "supports publish/draft" do
      @drafted = described_class.create drafted: true
      @published = described_class.create drafted: false
      @unspecified = described_class.create

      described_class.drafted.should include(@drafted)
      described_class.drafted.should_not include(@published, @unspecified)

      described_class.published.should include(@published, @unspecified)
      described_class.published.should_not include(@drafted)
    end
  end
end

In model:

  it_behaves_like Draftable