code: def from_db_value(self, value, expression, connection, context):
          '''Handle data loaded from database.'''
          if value is None:
              return value
          return self.parse_seconds(valuef from_db_value(self, value, expression, connection, context):
          '''Handle data loaded from database.'''
          if value is None:
              return value
          return self.parse_seconds(value)
docs: Handle data loaded from database.