class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Uuid

def format_uuid(uuid)
  if uuid.match?(CANONICAL_UUID)
    uuid
  else
    uuid = uuid.delete("{}-").downcase
    "#{uuid[..7]}-#{uuid[8..11]}-#{uuid[12..15]}-#{uuid[16..19]}-#{uuid[20..]}"
  end
end