Strong parameters with devise

application_controller.rb

class ApplicationController < ActionController::Base  

  before_filter :define_resource_params, if: :devise_controller?

  protected
  def define_resource_params
    if ((self.class <= Devise::PasswordsController) || (self.class <= Devise::RegistrationsController))
      self.class.send(:define_method, :resource_params) do
        params.require(resource_name).permit(:email, :password, :password_confirmation)
      end
    end
  end

end