自动加载常量用户时检测到循环依赖 [英] Circular dependency detected while autoloading constant User

问题描述

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

I've followed this tutorial (http://railscasts.com/episodes/236-omniauth-part-2) for creating facebook login with OmniAuth and Devise and I get this error: Circular dependency detected while autoloading constant User in my routes.rb

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

registrations_controller.rb

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

这是我从 AuthenticationsController 创建的方法

and here's my create method from AuthenticationsController

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

推荐答案

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

Where was your registrations_controller.rb saved to? The location is important. I found that I was making a mistake saving it to app/controllers/devise/.. It simply needed to be saved in app/controllers/. e.g.:

app/controllers/registrations_controller.rb

另外，config/routes.rb 路由应该定义为:

Also, config/routes.rb route should be defined as:

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

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