module Mobile module Entities class Syllabus < Grape::Entity expose :title expose :id expose :can_setting, if: lambda { |instance, options| options[:user] } do |instance, options| current_user = options[:user] can_setting = instance[:user_id] == current_user.id ? true : false can_setting = false if instance[:id].nil? can_setting end expose :courses, using: Mobile::Entities::Course end end end