Run code during the Devise registration process

October 12, 2019
I'm making an alternative to DevTools. Click here to check it out.

This post will show you how to run code when creating a user in the Devise registration process. In my opinion, this should be a last resort — if you’re considering this approach, skim my other post first. Let’s begin:

1. Add a new controller at app/controllers/registrations_controller.rb:

class RegistrationsController < Devise::RegistrationsController


    def sign_up(resource_name, resource)
      puts "This user's email is #{}."
      sign_in(resource_name, resource)

Devise automatically runs sign_up when the user submits the registration form. You can access the current user as resource, and we need to call sign_in per the original RegistrationsController.

2. Tell Devise to use this controller inside config/routes.rb.

devise_for :users, :controllers => {
  registrations: 'registrations'

And there you go! That’s all you need to do to run code during registration. Again, you might want to skim my other post before committing to a custom registration process because it can open up a can of worms.