ActiveAdmin: how to leave user password unchanged?

Question

I am using ActiveAdmin as my administration backend in my rails app. Basically, I have an admin_user and a user model.

When I create a new us

Answer 1

You don't really need to mess at all with Devise's registration controller, you can just ignore empty password fields inside ActiveAdmin's resource controller:

ActiveAdmin.register User do
  controller do

    def update
      model = :user

      if params[model][:password].blank?
        %w(password password_confirmation).each { |p| params[model].delete(p) }
      end

      super
    end
  end
end