[ruby on rails] - Image helper for retina display with foundation interchange

interchange_helper.rb

module ApplicationHelper
  def retina_image_tag(default_name, options={})
    retina_name = default_name.gsub(%r{\.\w+$}, '@2x\0')
    retina_image_tag(default_name, options.merge('data-interchange' => "[#{asset_path(retina_name)}, (retina)]"))
  end
end

interchange_image_tag.rb

= image_tag('front/static/logo.png', alt: 'Description', 'data-interchange' => "[#{image_path('front/static/logo@2x.png')}, (retina)]")

interchange_result.html

<img src="/assets/front/static/global/logo.png" data-interchange="[/assets/front/static/global/logo@2x.png, (retina)]" alt="Description">