Question

我正在尝试使用Rails 4＆amp;设计。

我正在尝试遵循本教程：

http://sourcey.com/rails-4-omniauth-using-devise-with-twitter-facebook-and-linkedin/

当我完成这些步骤并运行服务器时，我收到此错误

class Comparer : IEqualityComparer<KeyValuePair<KeyValuePair<string,string>, int>>
{
    // Products are equal if their names and product numbers are equal.
    public bool Equals(KeyValuePair<KeyValuePair<string,string>, int> x, KeyValuePair<KeyValuePair<string,string>, int> y)
    {
        //Check whether the compared objects reference the same data.
        if (Object.ReferenceEquals(x, y)) return true;

        //Check whether any of the compared objects is null.
        if (Object.ReferenceEquals(x, null) || Object.ReferenceEquals(y, null))
            return false;

        //Check whether the products' properties are equal.
        return x.Key.Key == y.Key.Key || x.Key.Value == y.Key.Value;
    }

    public int GetHashCode(KeyValuePair<string,string> kvp)
    {
        //Check whether the object is null
        if (Object.ReferenceEquals(kvp, null)) return 0;

        return kvp.GetHashCode();
    }
}

//call Intersect using the custom comparer
dict1.Intersect(dict2, new Comparer());

完成注册方法是：

NoMethodError (undefined method `update' for nil:NilClass):
2015-12-14T20:37:03.180526+00:00 app[web.1]:   app/controllers/users_controller.rb:43:in `finish_signup'
2015-12-14T20:37:03.180540+00:00 app[web.1]:

确定为问题的具体行是：

 def finish_signup
    # authorize! :update, @user 
    if request.patch? && params[:user] #&& params[:user][:email]
      if @user.update(user_params)
        @user.skip_reconfirmation!
        sign_in(@user, :bypass => true)
        redirect_to @user, notice: 'Your profile was successfully updated.'
      else
        @show_errors = true
      end
    end
  end

有谁看到出了什么问题？我不知道如何阅读错误以了解其抱怨的内容。有谁能看到这个问题？

Answer 1

您收到错误，因为@user为nil。

我可以从您的评论中看到，您需要更新此

before_action :set_user, only: [:index, :show, :edit, :update, :destroy]

到这个

before_action :set_user, only: [:index, :show, :edit, :update, :destroy, :finish_signup]

Rails 4，Devise＆amp; Omniauth - 没有方法错误

1 个答案: