Due to some recent changes in the `rails4` branch of Devise, I needed to update the code I borrowed from https://gist.github.com/kazpsp/3350730. Here it is. Read more on the [Rails 4 Devise branch README](https://github.com/plataformatec/devise/tree/rails4#strong-parameters). If you want to see what options you can pass into `devise_parameter_sa…

registrations_controller.rb

# controllers/users/registrations_controller.rb
class Users::RegistrationsController < Devise::RegistrationsController

  before_filter :configure_permitted_parameters

  protected

  # my custom fields are :name, :heard_how
  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) do |u|
      u.permit(:name, :heard_how,
        :email, :password, :password_confirmation)
    end
    devise_parameter_sanitizer.for(:account_update) do |u|
      u.permit(:name,
        :email, :password, :password_confirmation, :current_password)
    end
  end

end

Thanks @Ruby-rocker, works good :)