ruby-on-rails – Rails：ActiveSupport的未定义方法`primary_ke

当我尝试编辑用户的详细信息时,我收到以下错误：

undefined method `primary_key' for ActiveSupport::HashWithIndifferentAccess:Class

通过表格提交的数据是：

{"utf8"=>"?","_method"=>"put","authenticity_token"=>"Ap0JP2bs/w9J6iI9rZahiKR1K8UEIi7rp33a4OutMbo=","user"=>{"email"=>"some_email@yahoo.com","rolable"=>{"first_name"=>"Cristian","last_name"=>"Gavrila","city"=>"16"}},"commit"=>"Update"}

控制器方法是：

def update
    @user = User.find(current_user.id)

    if @user.update_attributes(params[:user])
      redirect_to edit_user_registration_path,notice: 'Your profile was successfully updated.'
    else
      redirect_to edit_user_registration_path,error: "Something went wrong,couldn't update your profile!."
    end
  end

型号：

1.用户

class User < ActiveRecord::Base
  belongs_to :rolable,:polymorphic => true

  # Devise business
  devise :database_authenticatable,:registerable,:recoverable,:rememberable,:trackable,:validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :remote_avatar_url,:avatar,:login,:username,:email,:password,:password_confirmation,:remember_me

  # For authenticating with facebook
  attr_accessible :provider,:uid,:rolable
  devise :omniauthable,:omniauth_providers => [:facebook]

  # For authenticating with both username or email
  attr_accessor :login

  # Upload avatar
  mount_uploader :avatar,AvatarUploader

  # Makes username necessary
  validates :username,:presence => true
end

2.客户

class Customer < ActiveRecord::Base
  has_one :user,:as => :rolable
  has_one :preferences,:class_name => "CustomerPreferences"
  belongs_to :city

  attr_accessible :first_name,:last_name
end

有什么问题？