module ActionView::Helpers::ControllerHelper

def assign_controller(controller)
  if @_controller = controller
    @_request = controller.request if controller.respond_to?(:request)
    @_config  = controller.config.inheritable_copy if controller.respond_to?(:config)
    @_default_form_builder = controller.default_form_builder if controller.respond_to?(:default_form_builder)
  end
end