devise guest

gistfile1.txt

>form action="/users" method="post">
  <input type="hidden" name="is_guest_account" value="true">
  <input type="submit" value="Try it!">
</fprm>

registrations_controller.rb

class Devise::Custom::RegistrationsController < Devise::RegistrationsController
  def create
    if params[:is_guest_account]
      guest_token = rand(36**6).to_s(36)
      guest_pass = rand(36**64).to_s(36)      
      params[:user] = {
        email: "guest_#{guest_token}@yourdomain.com",
        password: guest_pass,
        password_confirmation: guest_pass
      }
      super
    end
  end
end