krisleech

class MyPresenter
  def initialize(user)
    @user = user
  end

  def admin_only(&block)
    yield if user.admin?
  end
end

kossnocorp

def back_or_home_path
  referrer = controller.respond_to?(:request) && controller.request.env['HTTP_REFERER']
  local_referrer = referrer && URI.parse(referrer).host == controller.request.host
  if referrer && local_referrer
    referrer
  else
    root_path
  end
end

sharipov-ru

config.middleware.use RoutesReloader