相关疑难解决方法(0)

我对rails很新,我正在尝试创建用户登录.我浏览了这里的教程.最后它让我为质量分配添加"attr_accessible".但是,当我这样做时,我收到以下错误:

undefined method `attr_accessible' for #<Class:0x007ff70f276010>

我在这篇文章中看到我需要<ActiveRecord :: Base.但我确实包含了这一点.这是我的用户模型的代码:

class User < ActiveRecord::Base

  attr_accessor :password
  EMAIL_REGEX = /\A[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\z/i
  validates :username, :presence => true, :uniqueness => true, :length => { :in => 3..20 }
  validates :email, :presence => true, :uniqueness => true, :format => EMAIL_REGEX
  validates :password, :confirmation => true #password_confirmation attr
  validates_length_of :password, :in => 6..20, :on => :create
  before_save :encrypt_password
  after_save :clear_password
  attr_accessible :username, :email, :password, :password_confirmation

  def encrypt_password
    if password.present?
      self.salt = BCrypt::Engine.generate_salt
      self.encrypted_password= …