hubfeenix.fi/app/controllers/application_controller.rb

class ApplicationController < ActionController::Base

  include Pundit::Authorization
  alias :current_user :current_member #for pundit
  rescue_from Pundit::NotAuthorizedError, with: :user_not_authorized

  protected

  def user_not_authorized
    flash[:alert] = "You are not authorized to perform this action."
    redirect_back(fallback_location: root_path)
  end
end