module ActiveFedora::WithMetadata

def create_or_update(*)
  return unless super && !new_record?
  # TODOs captured as https://github.com/samvera/active_fedora/issues/1331
  metadata_node.metadata_uri = described_by # TODO: only necessary if the URI was < > before
  metadata_node.save # TODO: if changed?
end

def metadata_node
  @metadata_node ||= self.class.metadata_schema.new(self)
end