Ruby on rails 3 Rails OAutheException:：必须使用活动访问令牌来查询有关当前用户的信息

Iam在我的rails应用程序中使用来获取和设置访问令牌（如果它通过facebook验证）。我有一个邀请控制器，用户必须通过身份验证才能邀请朋友。我的代码如下所示：

 def facebook
   if params[:code]
     set_oauth_token(params[:code])
   elsif params[:error]
     redirect_to landing_path, :alert => "Access Denied"
     return
   end

   if current_user.oauth_token.nil?
     redirect_to client.authorization_uri(
     :scope => "user_about_me, email, publish_stream, user_location, user_interests, user_birthday, user_likes, user_hometown, offline_access"
      )
   end

 private

 def set_oauth_token(token)
   client.authorization_code = params[:code]
   access_token = client.access_token! :client_auth_body
   user = FbGraph::User.me(access_token).fetch
   current_user.oauth_token = access_token
   current_user.save(:validate => false)
 end

  def client
    FbGraph::Auth.new(ENV["FACEBOOK_KEY"], ENV["FACEBOOK_SECRET"], :redirect_uri =>  invites_facebook_url).client
  end

但我发现了一个错误：

 FbGraph::InvalidRequest at /invites/facebook
 OAuthException :: An active access token must be used to query information about the current user.

错误出现在以下行：

user = FbGraph::User.me(access_token).fetch

我试图寻找解决方案并修改了代码，但仍然无法解决问题。仅此而已，oauth令牌无效

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请帮我找到解决办法。非常感谢

最后我得到了一个错误，那就是在回调之后，你必须再次点击facebook才能获得oauth令牌。我已经修改了我的代码，它工作了

用户模型

用户控制器

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您以前是否编写过类似的代码，而且还可以使用？@kspacja我找到了解决方案并发布了我的答案。你可以查一下。谢谢@swati:）。。这真的很有帮助。

def self.auth(redirect_url)
    FbGraph::Auth.new(ENV["FACEBOOK_KEY"], ENV["FACEBOOK_SECRET"], :redirect_uri =>  redirect_url)
end

def facebook
  if params[:code]
    set_oauth_token(params[:code])
  elsif params[:error]
    redirect_to landing_path, :alert => "Access Denied"
    return
  end

  if current_user.oauth_token.nil?
    client = User.auth(invites_facebook_url).client
    redirect_to client.authorization_uri(
    :scope => "user_about_me, email, publish_stream, user_location, user_interests, user_birthday, user_likes, user_hometown, offline_access"
    )
 end
end

private

  def set_oauth_token(token)
    client = User.auth(invites_facebook_url).client
    client.authorization_code = params[:code]
    access_token = client.access_token! :client_auth_body
    user = FbGraph::User.me(access_token).fetch
    current_user.oauth_token = access_token
    current_user.save(:validate => false)
  end