imageable_as_bloated_module_factory.rb

class Imageable < Module
  def initialize(has_one: %i(main_image))
    has_one.each do |image_kind|
      define_method image_kind do
        images.find { |image| image.kind == 'main_image' }
      end
    end
  end

  def included(model_class)
    model_class.has_many :images
  end
end