mysql - Rails 控制台未将数据写入数据库

Question

我正在学习 Hartl 教程，但遇到了问题。当我尝试在控制台中添加用户时，它不会返回它已保存我刚刚输入的任何信息。代码如下，希望你们能引导我走向正确的方向。用户模型:

class User < ActiveRecord::Base

    attr_accessor :name, :email 

    before_save { self.email = email.downcase}
    validates :name, presence: true, length: {maximum: 50}
    VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
    validates :email, presence: true, length: {maximum: 255},
                        format: { with: VALID_EMAIL_REGEX },
                        uniqueness: {case_sensitive: false}
    has_secure_password
    validates :password, length: { minimum: 6 }
end

错误:

2.2.0 :003 > User.create(name: "Jim Bob", email: "jim@bob.com", password: "jimmybob", password_confirmation: "jimmybob")
   (0.1ms)  begin transaction
  User Exists (0.1ms)  SELECT  1 AS one FROM "users" WHERE LOWER("users"."email") = LOWER('jim@bob.com') LIMIT 1
  SQL (0.4ms)  INSERT INTO "users" ("password_digest", "created_at", "updated_at") VALUES (?, ?, ?)  [["password_digest", "$2a$10$I61hwA3iAQmzsT/wbb0wpOSannOBNPLtQsBhscjakS5OgCi6zJoMq"], ["created_at", "2015-02-13 23:45:32.636129"], ["updated_at", "2015-02-13 23:45:32.636129"]]
   (137.3ms)  commit transaction
 => #<User id: 1, name: nil, email: nil, created_at: "2015-02-13 23:45:32", updated_at: "2015-02-13 23:45:32", password_digest: "$2a$10$I61hwA3iAQmzsT/wbb0wpOSannOBNPLtQsBhscjakS5..."> 

我不明白为什么姓名和电子邮件不会保存。请任何帮助都会很棒。

Answer 1

这是因为您已经为姓名和电子邮件定义了 attr_accessor。

attr_accessor 将覆盖事件记录生成的方法，因此不会将其保存到数据库中。