Generating unique token on the fly with Rails

Question

I want to generate a token in my controller for a user in the \"user_info_token\" column. However, I want to check that no user currently has that token. Would this code suffice

Answer 1

I have many models I apply unique tokens to. For this reason I've created a Tokened concern in app/models/concerns/tokened.rb

module Tokened

  extend ActiveSupport::Concern

  included do
    after_initialize do
      self.token = generate_token if self.token.blank?
    end
  end

  private
    def generate_token
      loop do
        key = SecureRandom.base64(15).tr('+/=lIO0', 'pqrsxyz')
        break key unless self.class.find_by(token: key)
      end
    end
end

In any model I want to have unique tokens, I just do

include Tokened

But yes, your code looks fine too.