class GroupShowSerializer < BasicGroupSerializer attributes :is_group_user, :is_group_owner, :mentionable def include_is_group_user? authenticated? end def is_group_user !!fetch_group_user end def include_is_group_owner? authenticated? end def is_group_owner scope.is_admin? || fetch_group_user&.owner end def include_mentionable? authenticated? end def mentionable Group.mentionable(scope.user).exists?(id: object.id) end private def authenticated? scope.authenticated? end def fetch_group_user @group_user ||= object.group_users.find_by(user: scope.user) end end