module ActionController::Railties::Helpers

def inherited(klass)
  super
  return unless klass.respond_to?(:helpers_path=)
  if namespace = klass.module_parents.detect { |m| m.respond_to?(:railtie_helpers_paths) }
    paths = namespace.railtie_helpers_paths
  else
    paths = ActionController::Helpers.helpers_path
  end
  klass.helpers_path = paths
  if klass.superclass == ActionController::Base && ActionController::Base.include_all_helpers
    klass.helper :all
  end
end