class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable

  attr_accessor:login
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
  has_one :user_profile ,dependent: :destroy #定义user与user_profile的一对一对关系

  ACCESSABLE_ATTRS = [:userid, :email, :telno, :current_password, :password, :password_confirmation]

  # VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  # validates :email, presence: true, length: { maximum: 255 },format: { with: VALID_EMAIL_REGEX },uniqueness: { case_sensitive: false }
  # validates :userid,presence: true, length: { maximum: 255 },uniqueness: { case_sensitive: false }
  # validates :telno,presence:  true, length: { maximum: 14 }, uniqueness: true
  before_save :ensure_authentication_token!


  def self.find_for_database_authentication(warden_conditions)
    conditions = warden_conditions.dup
    if login = conditions.delete(:login)
      where(conditions.to_h).where(["lower(userid) = :value OR lower(email) = :value OR lower(telno) = :value", { :value => login.downcase }]).first
    else
      where(conditions.to_h).first
    end
  end
end 

然后就是 user_profile

class UserProfile < ActiveRecord::Base
  SEXTPYE = %w{男 女}
  POSITION= %w{学生 辅导员  科目教师}

  # validates :name,presence:  true, length: { maximum: 80 }, uniqueness: true

  mount_uploader :avatar, AvatarUploader

  belongs_to  :user  

end  

在判断 current_user 不为空的条件下用户完善子的 userprofile 调用 UserprofilesController 的 new 方法结果出现这个错误 这是我 userprofilescontroller 代码：

class UserProfilesController < ApplicationController
  before_filter :authenticate_user!,only: [:show, :create, :edit, :update]

  def show
    @profile = UserProfile.find(params[:id])
  end

  def update
    @profile = UserProfile.find(params[:id])
    respond_to do |format|
      if @profile.update_attributes(profile_params)
        format.html { redirect_to root_path, notice: '已更新个人用户信息.' }
        format.json { render :show, status: :ok, location: @profile }
      else
        format.html { render :edit }
        format.json { render json: @profile.errors, status: :unprocessable_entity }
      end
    end
  end

  def new
    @profile = UserProfile.new
  end

  def edit
    @profile = current_user.user_profile
  end

  def create
    @profile = current_user.build_user_profile(profile_params)
    if @profile.save
     flash[:success] = "用户信息已更新"
     redirect_to root_path
    else
     render 'edit'
    end 
  end

  def destroy
    @profile.destroy
    rediret_to current_user
  end

  private
   def profile_params
     params.require(:user_profile).permit(:name,:sexuality,:age,:bloodtype,:class,:nickname,:mark,:position,:birthday,:avatar)
   end
end