Classe « Mapper »

Méthode sqlalchemy.orm.Mapper.identity_key_from_instance

Signature de la méthode identity_key_from_instance

def identity_key_from_instance(self, instance) 

Description

identity_key_from_instance.__doc__

Return the identity key for the given instance, based on
        its primary key attributes.

        If the instance's state is expired, calling this method
        will result in a database check to see if the object has been deleted.
        If the row no longer exists,
        :class:`~sqlalchemy.orm.exc.ObjectDeletedError` is raised.

        This value is typically also found on the instance state under the
        attribute name `key`.