Rails - 更新數據庫中的模型

所以我遇到了一個驗證問題 - 我創建了一個驗證，以確保數據庫中的用戶不共享相同的電子郵件地址。然後我在數據庫中創建了一個用戶。之後，我說user = User.find(1)返回了我剛創建的用戶。然後我想改變它的名字，所以我說user.name = "New Name"，然後嘗試使用user.save將它保存回數據庫。然而，這個命令不再工作（它會返回false），我認爲這與我的唯一性驗證測試有關。有人可以幫我解決這個問題嗎？Rails - 更新數據庫中的模型

# == Schema Information 
# 
# Table name: users 
# 
# id   :integer   not null, primary key 
# name  :string(255) 
# email  :string(255) 
# created_at :datetime 
# updated_at :datetime 
# 

class User < ActiveRecord::Base 
    attr_accessor :password 

    attr_accessible :name, :email,     #says that the name and email attributes are publicly accessible to outside users. 
        :password, :password_confirmation #it also says that all attributes other than name and email are NOT publicly accessible. 
                 #this protects against "mass assignment" 

    email_regex = /^[A-Za-z0-9._+-][email protected][A-Za-z0-9._-]+\.[A-Za-z0-9._-]+[A-Za-z]$/ #tests for valid email addresses. 


    validates :name, :presence => true, 
        :length => {:maximum => 50} 
    validates :email, :presence => true, 
         :format => {:with => email_regex}, 
         :uniqueness => {:case_sensitive => false} 
    validates :password, :presence => true, 
         :length => {:maximum => 20, :minimum => 6}, 
         :confirmation => true 

    before_save :encrypt_password 

    def has_password?(submitted_password) 
     #compare encrypted_password with the encrypted version of the submitted password. 
     encrypted_password == encrypt(submitted_password) 
    end 

    def self.authenticate(email, submitted_password) 
     user = find_by_email(email) 
     if (user && user.has_password?(submitted_password)) 
      return user 
     else 
      return nil 
     end 
    end 

    private 

     def encrypt_password 
      if (new_record?) #true of object has not yet been saved to the database 
       self.salt = make_salt 
      end 
      self.encrypted_password = encrypt(password) 
     end 

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

     def secure_hash(string) 
      Digest::SHA2.hexdigest(string) #uses cryptological hash function SHA2 from the Digest library to encrypt the string. 
     end 

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

來源

2011-06-18 Kvass

我看到的唯一錯誤信息就是當我輸入user.save進入IRB時「false」。我編輯了我的帖子以包含用戶模型源代碼。 – Kvass

改用'user.save！'來查看拋出了什麼異常。同時檢查'user.valid？'，如果這個錯誤'user.errors'。由於^^^解決了 – Jonah

試試保存！並看看有什麼例外告訴你

來源

2011-06-18 22:02:07 Sheena

問題 – Kvass

Rails - 更新數據庫中的模型

回答

相關問題