Question

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

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

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?

Answer 1

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 */

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