未初始化的常量用戶omniauth_callbacks_controller與gem omniauth-facebook在ruby on rails app

Question

我在使用rails設計和omniauth-facebook時遇到了麻煩。 我安裝了gem omniauth-facebook和gem devise gem omniauth-facebook 。

我在config / application.yml中設置了我的fb秘密和密鑰。 我在#config / initializers / devise.rb中配置了設計：

Devise.setup do |config|
  config.omniauth :facebook, ENV["FB_ID"], ENV["FB_SECRET"], scope: 'email', info_fields: 'email, first_name,last_name', image_size: 'large'
end

我修改了我的路線如下：

配置/ routes.rb中

Rails.application.routes.draw do
  devise_for :users, controllers: { omniauth_callbacks: 'users/omniauth_callbacks' }
end

我改變了我的用戶模型：

# app/models/user.rb

class User < ActiveRecord::Base
  devise :omniauthable, omniauth_providers: [:facebook]
end

我添加了以下rails遷移：

$ rails g migration AddOmniauthToUsers \
    provider uid picture first_name last_name token token_expiry:datetime
$ rake db:migrate

在我的用戶模型中：

# app/models/user.rb
class User < ActiveRecord::Base
  def self.find_for_facebook_oauth(auth)
    where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
      user.provider = auth.provider
      user.uid = auth.uid
      user.email = auth.info.email
      user.password = Devise.friendly_token[0,20]  # Fake password for validation
      user.first_name = auth.info.first_name
      user.last_name = auth.info.last_name
      user.picture = auth.info.image
      user.token = auth.credentials.token
      user.token_expiry = Time.at(auth.credentials.expires_at)
    end
  end
end

我創建了一個新的控制器來處理Omniauth回調請求

# app/controllers/users/omniauth_callbacks_controller.rb

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def facebook
    user = User.find_for_facebook_oauth(request.env['omniauth.auth'])

    if user.persisted?
      sign_in_and_redirect user, event: :authentication
      set_flash_message(:notice, :success, kind: 'Facebook') if is_navigational_format?
    else
      session['devise.facebook_data'] = request.env['omniauth.auth']
      redirect_to new_user_registration_url
    end
  end
end

我的facebook連接可以在我的本地應用程序上工作，但它會使應用程序從一開始就崩潰，並顯示以下錯誤信息：

我已經在heroku和heroku上正確設置了我的環境變量rake db：migrate。

這個錯誤來自哪里，我該如何解決？

/app/app/controllers/Users/omniauth_callbacks_controller.rb:1:in `<top (required)>': uninitialized constant Users (NameError)
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:472:in `block (2 levels) in eager_load!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:471:in `each'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:471:in `block in eager_load!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:469:in `each'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:469:in `eager_load!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/engine.rb:346:in `eager_load!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application/finisher.rb:56:in `each'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
    from /app/vendor/ruby-2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!'
    from /app/config/environment.rb:5:in `<top (required)>'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:328:in `require_environment!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:142:in `require_application_and_environment!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:67:in `console'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
    from /app/bin/rails:9:in `require'
    from /app/bin/rails:9:in `<main>'

Answer 1

第一種可能的方案

如果您的rails控制台未加載包含被調用方法的類文件的配置，則會發生名稱錯誤未初始化的常量類。 這意味着該類沒有加載應用程序。

你在application.rb文件中看到這個config.autoload_paths + =％W（＃{config.root} / lib）嗎？ 如果沒有，你可以把它放在那里再試一次嗎？ 讓我知道事情的后續。

第二種可能方案：

嘗試切換回：

 devise_for :users, controllers: { omniauth_callbacks: 'omniauth_callbacks' 

當然，移動chnaged

class OmniauthCallbacksController < Devise::OmniauthCallbacksController

到app / controllers / omniauth_callbacks_controller.rb

希望這可以幫助！ 讓我知道