Classe « Mapper »

Méthode sqlalchemy.orm.Mapper.identity_key_from_row

Signature de la méthode identity_key_from_row

def identity_key_from_row(self, row, identity_token=None, adapter=None) 

Description

identity_key_from_row.__doc__

Return an identity-map key for use in storing/retrieving an
        item from the identity map.

        :param row: A :class:`.Row` instance.  The columns which are
         mapped by this :class:`_orm.Mapper` should be locatable in the row,
         preferably via the :class:`_schema.Column`
         object directly (as is the case
         when a :func:`_expression.select` construct is executed), or
         via string names of the form ``<tablename>_<colname>``.