自动加载常量用户时检测到循环依赖性

Question

我已经按照本教程(http://railscasts.com/episodes/236-omniauth-part-2)使用OmniAuth和Devise创建facebook登录,我收到此错误:在我的路由中自动加载常量用户时检测到循环依赖性. RB

  devise_for :users , :controllers => {:registrations => 'registrations'}

registrations_controller.rb

Class RegistrationsController < Devise::RegistrationsController

  def create
    super
    session[:omniauth] = nil unless @user.new_record?
  end

  private

  def build_resource(*args)
    super
    if session["devise.omniauth"]
      @user.apply_omniauth(session["devise.omniauth"])
      session["devise.omniauth"] = nil
   end
  end
end

这是来自AuthenticationsController的我的创建方法

def create
    omniauth = request.env["omniauth.auth"]
    authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid'])
    if authentication
      flash[:notice] = "Signed in successfully."
      sign_in_and_redirect(:user, authentication.user)
    elsif current_user
      current_user.authentications.create!(:provider => omniauth['provider'], :uid => omniauth['uid'])
      flash[:notice] = "Authentication successful."
      redirect_to authentications_url
    else
      user = User.new
      user.apply_omniauth(omniauth)
      if user.save
        flash[:notice] = "Signed in successfully."
        sign_in_and_redirect(:user, user)
      else
        session[:omniauth] = omniauth.except('extra')
        redirect_to new_user_registration_url
      end
    end
end

Answer 1

你被registrations_controller.rb保存到哪里了？位置很重要.我发现我在保存它时犯了一个错误app/controllers/devise/..它只需要保存在app/controllers/.例如:

app/controllers/registrations_controller.rb

此外,config/routes.rb路线应定义为:

devise_for :users, controllers: { registrations: 'registrations' }

Answer 2

很多宝石在 Rails 4 上开始损坏，这都是由于控制器中的卸载问题造成的。 https://github.com/flyerhzm/switch_user/issues/34 https://github.com/thoughtbot/high_Voltage/issues/68 https://github.com/thoughtbot/clearance/issues/276 等等

您应该检查哪个 gem 造成了问题。一旦您知道：1）检查该 gem 的未解决问题 2）如果该问题存在并已修复，请确保您已修复该问题，否则更新该 gem。3）如果没有，您可以创建一个问题并要求他们解决。4）如果你不想等待他们的修复，你可以形成gem并为其推送修复 https://github.com/cashins/email_preview/commit/b34a077a954b98bd086153fae8979ad142667555 所有修复都是相同的（从指定控制器中删除可卸载的）

希望能帮助到你。

如果没有什么可以帮助降级你的 Rails 版本。