堆棧級別太深：創建子級記錄

Question

我的問題：用戶has_one配置文件。當新用戶創建時，APP也會自動創建屬於用戶的配置文件。我試圖通過控制器，通過回調，總是相同的錯誤（堆棧層太深）。我的模型：

class User < ActiveRecord::Base 
    has_secure_password 
    attr_accessible :email, :password, :password_confirmation 
    validates_uniqueness_of :email, :case_sensitive => false 
    validates :email, :email_format => true 
    validates :password, :length=> {:in=> 5...32} 
    validates :email, :password, :password_confirmation, :presence =>true 
    has_many :authentications 
    has_many :tests 
    has_many :answers 
    has_many :results 
    has_one :profile 
    #after_create :build_profile 
    #tried this way 

    def build_profile 
    self.build_profile 
    end 

end 

＃

class Profile < ActiveRecord::Base 
     attr_accessible :user_id 
     belongs_to :user 
    end 

＃

def create 
     @user = User.new(params[:user]) 
     @user.email=@user.email.downcase 
     if @user.save 
      session[:user_id] = @user.id 
      @profile=@user.build_profile 
      redirect_to root_url, notice: "Thank you for signing up!" 
     else 
     render "new" 
     end 
     end 

Alsways同樣的錯誤。爲什麼？

Answer 1

def build_profile 
    self.build_profile 
end 

這無休止地循環（我不能看到這一點，那你想幹什麼？）

你應該簡單地刪除build_profile方法（不用擔心，它的定義感謝協會）。

---

user = User.new 

user.build_profile 
    |_ calls self.build_profile, but self is user 
    |_ calls user.build_profile 
     |_ ...