ruby-on-rails – Model / ActiveRecord不保存新数据

发布时间：2020-12-17 02:04:23 所属栏目：百科来源：网络整理

导读：我已经确认这种方法有效.基本上它从控制器接收电子邮件并更改特定用户的电子邮件. 但是它实际上从未保存过数据.我传递了错误的电子邮件格式,如果我传递正确的电子邮件方法返回true,则返回false,这意味着它分配了一封新电子邮件并称为安全. # Allows user to

我已经确认这种方法有效.基本上它从控制器接收电子邮件并更改特定用户的电子邮件.

但是它实际上从未保存过数据.我传递了错误的电子邮件格式,如果我传递正确的电子邮件方法返回true,则返回false,这意味着它分配了一封新电子邮件并称为安全.

# Allows user to change email address
def change_email(newmail)  
  address = EmailVeracity::Address.new(newmail)

  if address.valid?
    self.email = newmail
    self.save
    return true
  else
    return false
  end

end

我首先检查了日志中的任何提示,但我得到的只是：

Started POST "/members/editmail" for 127.0.0.1 at 2013-04-25 17:33:44 +0200
Processing by MembersController#editmail as HTML
  Parameters: {"authenticity_token"=>"*****=","mail"=>"*****@gmail.com"}
  ←[1m←[35mUser Load (1.0ms)←[0m  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  ←[1m←[36mCharacter Load (0.0ms)←[0m  ←[1mSELECT `characters`.* FROM `characters` WHERE `characters`.`user_id` = 1←[0m
  ←[1m←[35m (0.0ms)←[0m  BEGIN
  ←[1m←[36mUser Exists (0.0ms)←[0m  ←[1mSELECT 1 FROM `users` WHERE (`users`.`email` = BINARY '*****@gmail.com' AND `users`.`id` != 1) LIMIT 1←[0m
  ←[1m←[35mUser Exists (0.0ms)←[0m  SELECT 1 FROM `users` WHERE (`users`.`username` = BINARY '******' AND `users`.`id` != 1) LIMIT 1
  ←[1m←[36m (0.0ms)←[0m  ←[1mROLLBACK←[0m
Redirected to http://localhost:3000/members/1
Completed 302 Found in 10ms (ActiveRecord: 1.0ms)

使用方法更改此属性也很有意义.由于我正在使用Devise gem进行身份验证,因此我可以使用current_user变量来检索当前登录用户的User对象,然后只需调用current_user.email = newmail;控制器中的current_user.save.

解决方法

self.save！将在未保存时抛出异常.

此外,这可能不对：

self.save
return true

如果成功保存,self.save将返回true或false.所以你可能想要摆脱返回true并让返回值为self.save返回的值

在此上下文中不需要selfkeyword,也不需要返回关键字.所以这相当于你的代码：

# Allows user to change email address
def change_email(newmail)  
  address = EmailVeracity::Address.new(newmail)

  if address.valid?
    self.email = newmail
    save
    true
  else
    false
  end
end

这相当于

# Allows user to change email address
def change_email(newmail)  
  address = EmailVeracity::Address.new(newmail)

  if address.valid?
    self.email = newmail
    save
  end
  address.valid?
end

哪个也不应该是你想要的.

（编辑：李大同）

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