SmartUrlHelper.configure do |url|
  url.for ->model{ model.is_a?(Comment) } do |helpers, model|
    helpers.post_comment_path(model.post, model)
  end

  # TODO: Add a convenience method for matching on type:
  # url.for(Comment) do |helpers, model|
  #   helpers.post_comment_path(model.post, model)
  # end
end