class SynapseSerializer < ActiveModel::Serializer embed :ids, include: true attributes :id, :desc, :category, :weight, :permission, :created_at, :updated_at has_one :topic1, root: :topics has_one :topic2, root: :topics has_one :user #def filter(keys) # keys.delete(:outcome_author) unless object.outcome_author.present? # keys #end end