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我正在使用omniauth-facebook gem 来授权在我的rails 应用程序中使用facebook。

我已按照这些说明进行操作，但我面临的问题是有关无效凭据的错误：

(facebook) Authentication failure! invalid_credentials: OAuth2::Error, : 
{"error":{"message":"Error validating application. Invalid application ID.","type":"OAuthException","code":101}}

奇怪的是，即使我从 facebook api 收到此错误，我仍在获取用户信息。

request.env['omniauth.auth'] is(服务器日志)的值。

#<OmniAuth::AuthHash credentials=#<OmniAuth::AuthHash expires=true 
expires_at=1421256863 token="some_long_value"> extra=#<OmniAuth::AuthHash 
raw_info=#<OmniAuth::AuthHash education=[#<OmniAuth::AuthHash school=
#<OmniAuth::AuthHash id="174179219354091" name="Udacity"> type="College">]
email="ashish@gmail.com" favorite_athletes=[#<OmniAuth::AuthHash id="51926382304"  
name="Derrick Rose">, #<OmniAuth::AuthHash id="344128252278047" name="Sachin   
Tendulkar">,.... so on

路线.rb

devise_for :users, :controllers => {:omniauth_callbacks => "omniauth_callbacks"}

配置/初始化程序/omniauth.rb

OmniAuth.config.logger = Rails.logger

Rails.application.config.middleware.use OmniAuth::Builder do 
  provider :facebook, 'key', 'secret', {:provider_ignores_state => true}
  # key and secret are correctly added in above line
end

应用程序/模型/用户.rb

devise :omniauthable, :omniauth_providers => [:facebook]

应用程序/控制器/omniauth_callback_controller.rb

class OmniauthCallbacksController < Devise::OmniauthCallbacksController

  def facebook
    omniauth = request.env['omniauth.auth']
    # Other code to create authentication and other logic
    puts "===>>> Omniauth is #{omniauth}"
  end

  def failure
    res = request.env['omniauth.auth']
    puts "======>>>>>> Authentication failed #{res}"
    redirect_to root_path
  end  
end

每次响应都转到failure方法而不是 facebook 方法。

我不明白的是，当我从 api 收到无效凭据错误时，我怎么会从 facebook 获取所有数据。我怀疑在处理来自 facebook 的回调时我有什么问题。谁能指出问题出在哪里？

我很确定我使用了正确的应用程序 ID 和密钥，我在响应中从 facebook 获取数据。

有人可以帮我解决这个问题吗？

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