has_password問題？方法在railstutorial.org（第7章）

Question

我有與在this question中描述的完全相同的問題，但出於不同的原因，顯然。

This是本書的相關部分。

我已經完全按照書上所做的，據我所知，我的rspec測試都工作正常。

我的用戶模型代碼是這樣的：

require 'digest' #Needs digest to do password encryption 


class User < ActiveRecord::Base 

    attr_accessor :password 
    attr_accessible :name, :email, :password, :password_confirmation 
    validates :name, :presence => true, 
      :length => { :maximum => 20 } 

    email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i 

    validates :email, :presence => true, 
        :format => { :with => email_regex }, 
        :uniqueness => { :case_sensitive => false } 

    validates :password, :presence => true, 
         :confirmation =>true, 
         :length => { :within => 5..24 } 

    before_save :encrypt_password 

    def has_password?(submitted_password) 
    encrypt_password == encrypt(submitted_password) 
    end 




    private 

    def encrypt_password 
    self.salt = make_salt if new_record? 
    self.encrypted_password = encrypt(password) 
    end 

    def encrypt(string) 
    secure_hash("#{salt}--#{string}") 
    end 

    def make_salt 
    secure_hash("#{Time.now.utc}--#{password}") 
    end 

    def secure_hash(string) 
    Digest::SHA2.hexdigest(string) 
    end 


end 

正如我所說的，測試都工作正常，但has_password？總是在控制檯中返回false。 這是我在控制檯那樣：

ruby-1.9.2-p180 :002 > User.create!(:name => 'userdude', :email => 'a@a.com', :password => 'foobar', :password_confirmation => 'foobar') 

=> #<User id: 2, name: "userdude", email: "a@a.com", created_at: "2011-07-28 23:13:40", updated_at: "2011-07-28 23:13:40", encrypted_password: "84f9a1348af1f7e6610fb1d0c7002efe96f43dc97d807b3ac00...", salt: "13cf7bfd386af4fcf282ae5fa4831eb9d1dff15e842be8cba88..."> 

ruby-1.9.2-p180 :003 > User.all 
=> [#<User id: 2, name: "userdude", email: "a@a.com", created_at: "2011-07-28 23:13:40", updated_at: "2011-07-28 23:13:40", encrypted_password: "84f9a1348af1f7e6610fb1d0c7002efe96f43dc97d807b3ac00...", salt: "13cf7bfd386af4fcf282ae5fa4831eb9d1dff15e842be8cba88...">] 

ruby-1.9.2-p180 :004 > user = User.first 
=> #<User id: 2, name: "userdude", email: "a@a.com", created_at: "2011-07-28 23:13:40", updated_at: "2011-07-28 23:13:40", encrypted_password: "84f9a1348af1f7e6610fb1d0c7002efe96f43dc97d807b3ac00...", salt: "13cf7bfd386af4fcf282ae5fa4831eb9d1dff15e842be8cba88..."> 

ruby-1.9.2-p180 :005 > user 
=> #<User id: 2, name: "userdude", email: "a@a.com", created_at: "2011-07-28 23:13:40", updated_at: "2011-07-28 23:13:40", encrypted_password: "84f9a1348af1f7e6610fb1d0c7002efe96f43dc97d807b3ac00...", salt: "13cf7bfd386af4fcf282ae5fa4831eb9d1dff15e842be8cba88..."> 

ruby-1.9.2-p180 :006 > user.has_password?('foobar') 
=> false 
ruby-1.9.2-p180 :007 > 

正如你看到的，有沒有創建任何記錄，因爲在我掛了另一個問題。

Answer 1

好像你不小心混合encrypt_password和encrypted_password

試圖改變自己的has_password?方法是：

def has_password?(submitted_password) 
    self.encrypted_password == encrypt(submitted_password) 
    end 

的問題是，你用encrypt_password，所以如果你查找記錄，該明文密碼屬性password爲零，因此您的encrypt_password方法確實self.encrypted_password = encrypt(nil)