ruby-on-rails – 当设计重定向到登录路径时如何flash.keep

设计注册控制器：

class RegistrationsController < Devise::RegistrationsController
  protected
    def after_inactive_sign_up_path_for(resource)
      # store message to be displayed after redirection to login screen
      session[:registration_flash] = flash[:notice] if flash[:notice]
      super
    end
end

然后我会在登录请求期间显示此消息.
设计会话控制器：

class SessionsController < Devise::SessionsController
  def new
    flash[:notice] = session.delete(:registration_flash) if session[:registration_flash]
    super
  end
end