Customizing Devise with Strong Parameters

Question

I'm using Rails 4.0.0 and Devise 3.0.2 and trying to configure Devise with Strong Parameters following this instruction within the Devise README.

I wrote code like this in the application_controller.rb

class ApplicationController < ActionController::Base
  before_filter :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) << :nick
  end
end

Then I visited http://localhost:3000/users/sign_up. I got a NoMethodError in Devise::RegistrationsController#new, which says:

undefined method <<' for {}:ActionController::Parameters

and points to the exact line where I wrote devise_parameter_sanitizer.for(:sign_up) << :nick

Is there anything I did wrong? Thanks for your help.

Answer 1

Try:

    class ApplicationController < ActionController::Base
      ...
      before_filter :configure_permitted_parameters, if: :devise_controller?   
      ...
      def configure_permitted_parameters
         devise_parameter_sanitizer.for(:sign_up) { |u| 
            u.permit(:email, :password, :password_confirmation, :nick) 
         }
      end

It works for me! :D

Answer 2

As Jose Valim said, it's Devise 3.1.0.rc feature, that's why it doesn't work. You have to use other syntaxes that are in README.