Devise after_create in overrided RegistrationsController, Rails 3

I need to call after_create :something inside overrided Devise class RegistrationsController. Like this:

class RegistrationsController < Devis开发者_高级运维e::RegistrationsController
  after_create :something
end

But it does't work:

undefined method `after_create' for RegistrationsController:Class

What's wrong?

---

after_create is an ActiveRecord hook, not a controller hook. Maybe you're looking for after_filter?