docs: def _put(self, item: SQLBaseObject):
          """Puts a item into the database. Updates lastUpdate column"""
          if item._dto_type in self._expirations and self._expirations[item._dto_type] == 0:
              # The expiration time has been set to 0 -> shoud not be cached
              return
          item.updated()
          self._session().merge(item)