gistfile1.rb

require 'active_support'

module TestConcern
  extend ActiveSupport::Concern

  module ClassMethods
    def test_class_method
      puts "I gots class!"
    end
  end

  def test_instance_method
    self.class.test_class_method
  end
end


module TestConcern2
  extend ActiveSupport::Concern

  def test_instance_method
    self.class.test_class_method
  end

  module ClassMethods
    def test_class_method
      puts "I gots class!"
    end
  end
end


module TestConcern3
  extend ActiveSupport::Concern

  module ClassMethods
    def test_class_method
      puts "I gots class!"
    end
  end

  included do
    def test_instance_method
      self.class.test_class_method
    end
  end
end


module TestConcern4
  extend ActiveSupport::Concern

  included do
    def test_instance_method
      self.class.test_class_method
    end
  end

  module ClassMethods
    def test_class_method
      puts "I gots class!"
    end
  end
end