def last_backup_not_newer_than(self, datetime):
return Backup.query(ancestor=self.key) \
.filter(Backup.deleted == None) \
.filter(Backup.created <= datetime) \
.order(-Backup.created).get()
def __last_backup_async(self):
return Backup.query(ancestor=self.key) \
.filter(Backup.deleted == None) \
.order(-Backup.created) \
.get_async()