ruby-on-rails – 是否有一个Devise回调“你已经登录了.”？

问题是when the user is already authenticated,Devise调用after_sign_in_path_for方法.

当用户正常登录时也会调用此方法,因此即使您重写此方法,也无法区分刚刚登录的用户和已登录的用户.

唯一的解决方案是扩展/覆盖Devise的SessionsController：

class SessionsController < Devise::SessionsController

  private

  def require_no_authentication
    assert_is_devise_resource!
    return unless is_navigational_format?
    no_input = devise_mapping.no_input_strategies

    authenticated = if no_input.present?
      args = no_input.dup.push scope: resource_name
      warden.authenticate?(*args)
    else
      warden.authenticated?(resource_name)
    end

    if authenticated && resource = warden.user(resource_name)
      flash[:alert] = I18n.t("devise.failure.already_authenticated")
      redirect_to YOUR_PATH_HERE
    end
  end
end

由于此控制器继承自Devise,因此当您的控制器中未定义操作时,Devise的控制器将处理该操作.所以你只需要覆盖require_no_authentication方法,即is called in a before_filter.

最后,编辑您的路线文件,以使此更改生效：

# routes.rb
devise_for :users,:controllers => { :sessions => 'sessions' }