ruby on rails - Stack level too deep: creating child-record -

my problem: user has_one profile. when new user created, app automatically creates profile, belongs user. tried through controller, through callback, same error (stack level deep). models:

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 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 signing up!"         else          render "new"         end       end 

alsways same error. why?

def build_profile   self.build_profile end 

this loops endlessly (and can't see point, did want do?)

you should remove build_profile method (don't worry, it's defined association).

---

user = user.new  user.build_profile   |_ calls self.build_profile, self user     |_ calls user.build_profile       |_ ...