Question

以我rails应用程序我执行以下步骤：

用户需要登录 - >用户创建的授权 - >的用户被创建

该应用程序似乎被绊倒该过程的最后一步。

我成功地创建一个授权：

Authorization Load (0.9ms) SELECT "authorizations".* FROM "authorizations" WHERE "authorizations"."provider" = 'facebook' AND "authorizations"."uid" = '2259711' LIMIT 1 
Authorization attributes hash: {"id"=>1, "uid"=>"2259711", "provider"=>"facebook", "user_id"=>1, "created_at"=>Wed, 02 May 2012 06:06:13 UTC +00:00, "updated_at"=>Wed, 02 May 2012 06:06:13 UTC +00:00} 

但随后扼流圈用户创建步骤：

User Load (0.8ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1 
Completed 500 Internal Server Error in 26ms 

RuntimeError (Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id): 
    app/controllers/sessions_controller.rb:21:in `create' 

会话控制器的

21行是这样的：session[:user_id] = @auth.user.id

但是这使得没有意义，因为我已经清楚地初始化了一个用户对象的正确ID ...

管辖此步骤中的代码如下：

活动＃创建控制器

def create 
    # create the auth hash here 
    auth_hash = request.env['omniauth.auth'] 

    if session[:user_id] 
     # Means our user is signed in. Add the authorization to the user 
     User.find(session[:user_id]).add_provider(auth_hash) 

     redirect_back_or User.find(session[:user_id]) 
#  render :text => "You can now login using #{auth_hash["provider"].capitalize} too!" 
    else 
     # Log him in or sign him up 
     @auth = Authorization.find_or_create(auth_hash) 

     # Create the session 
     logger.debug "Person attributes hash: #{@auth.attributes.inspect}" 
     session[:user_id] = @auth.user.id 
#  render :text => "Welcome #{auth.user.name}!" 

     sign_in @auth.user 
     redirect_back_or @auth.user 
    end  
    end 

授权find_or_create模型方法

def self.find_or_create(auth_hash) 
     unless auth = find_by_provider_and_uid(auth_hash["provider"], auth_hash["uid"]) 
      user = User.create :name => auth_hash["info"]["name"], :email => auth_hash["info"]["email"] 
      logger.debug "Within Authorization find_or_create: Person attributes hash: #{user.attributes.inspect}" 
      auth = create :user => user, :provider => auth_hash["provider"], :uid => auth_hash["uid"] 
     end 
     auth 
    end 

UPDATE

当我试试这个：logger.debug "User attributes hash: #{@auth.user.attributes.inspect}" 在上面的会话控制器我得到这个错误：

NoMethodError (undefined method `attributes' for nil:NilClass): 
    app/controllers/sessions_controller.rb:21:in `create' 

这意味着用户对象为零。这不应该是这种情况，因为我在授权find_or_create方法内呼叫user.create ...

Answer 1

我不认为find_by_provider_and_uid设置用户属性，所以如果成功，你需要考虑到这一点。

auth = find_by_provider_and_uid(auth_hash["provider"], auth_hash["uid"]) 

if auth.nil? # i don't know if nil is the right condition to check for, my active record fu is not up to date. 
    # do your unless code 
else 
    #need to fetch and set user property 
end 

auth 

Answer 2

这可能是用户验证失败并且实际上并未被创建。将User.create更改为User.create!，如果验证失败，您将立即看到它，因为它会引发异常。