用户模型的未定义局部变量或方法`hashed_pa​​ssword'

Question

我正在尝试设置用户模型以成功将用户保存在数据库中，但我受到阻碍，NameError：未定义的局部变量或方法`hashed_pa​​ssword'用于＃＆lt; User：0x000001029fef18＆gt;

用户模型：

require 'digest'
class User < ActiveRecord::Base
  attr_accessor :password

  validates :email, :uniqueness => true, 
                    :length => { :within => 5..50 }, 
                    :format => { :with => /^[^@][\w.-]+@[\w.-]+[.][a-z]{2,4}$/i }
  validates :password, :confirmation => true,
                       :length => { :within => 4..20 },
                       :presence => true,
                       :if => :password_required?

  has_one :profile
  has_many :articles, :order => 'published_at DESC, title ASC',
                      :dependent => :nullify
  has_many :replies, :through => :articles, :source => :comments

  before_save :encrypt_new_password

  def self.authenticate(email, password)
    user = find_by_email(email)
    return user if user && user.authenticated?(password)
  end

  def authenticated?(password)
    self.hashed_password == encrypt(password)
  end

  protected
    def encrypt_new_password
      return if password.blank?
      self.hashed_password = encrypt(password)
    end

    def password_required?
      hashed_password.blank? || password.present?
    end

    def encrypt(string)
      Digest::SHA1.hexdigest(string)
    end
end

Answer 1

使用迁移将hashed_password字段添加到users表。它目前缺失。

Answer 2

我的第一个赌注是，hashed_pa​​ssword未定义为模型中的列。可能要检查此特定模型的迁移文件

Answer 3

添加

public class BinaryTreeNode<T> {

private BinaryTreeNode<T> left;
private BinaryTreeNode<T> right;
private T data;

public BinaryTreeNode(){
    this(null,null,null);
}

public BinaryTreeNode(T theData){
    this(theData,null,null);
}

public BinaryTreeNode(T theData, BinaryTreeNode<T> leftChild, BinaryTreeNode<T> rightChild){
    data = theData;
    left = leftChild;
    right = rightChild;

   @Override
public boolean equals(Object o){
        if(o instanceof BinaryTreeNode<?>) {
           BinaryTreeNode<?> n1 = (BinaryTreeNode<?>) o;
           if(this.getLeft() == null && n1.getLeft() == null && this.getRight() == null && n1.getLeft() == null) {
               return this.data == n1.getData();
           }
         if(this.getRight() == null && n1.getRight() == null && this.getLeft() != null && n1.getLeft() != null) {
             return this.data == n1.getData();
         }
         if(this.getLeft() == null && n1.getLeft() == null && this.getRight() != null && n1.getRight() != null) {
             return this.data == n1.getData();
         } else {

          return false;
         }
     }
}

public class BinaryTreeTesting {
BinaryTreeNode<Integer> node15 = new BinaryTreeNode<Integer>(5);
BinaryTreeNode<Integer> node2 = new BinaryTreeNode<Integer>(5);

  @Test
   public void testEqualsObjectNode() {
   assertTrue(node15.equals(node2));
   assertFalse(node1.equals(node2));

}

到Users.rb