设计。根据他的电子邮件自动创建用户名 [英] Devise. Create username automatically based on his email

问题描述

可以通过使用devise自动创建基于他的电子邮件的用户名吗？

Is it possible to created username based on his email automatically by using devise?

在注册页面上，我只有电子邮件和密码字段。

On register page, I have only email and password fields.

例如，当用户通过电子邮件创建一个新帐户 [e-mail] ，
我希望他的用户名自动成为 randomname 。如何实现？

For example, when user create a new account with email [e-mail], I'd like that his username automatically become a randomname. How can I accomplish it?

推荐答案

您可以使用正则表达式获得电子邮件地址的第一部分，如 ^ [^ @] + ，这将从 @ 标志之前的字符串开头返回所有内容。

You can get the firstpart of the email adress with a regex like ^[^@]+, this will return everything from the start of the string before the @ sign.

^ /* start of string or line */
[^@] /* character class capturing everything except @ */
+ /* match must happen atleast one time */

要将用户名添加到数据库，可以使用回调。

To add the username to your database, you can use a callback.

class User < ActiveRecord::Base
  before_create :set_username

  private
    def set_username
      self.username = self.email[/^[^@]+/]
    end
end

这篇关于设计。根据他的电子邮件自动创建用户名的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！