Synnefo

class ExtendedManager(models.Manager):

    def _update_or_create(self, **kwargs):

        assert kwargs, \

            'update_or_create() must be passed at least one keyword argument'

        obj, created = self.get_or_create(**kwargs)

        defaults = kwargs.pop('defaults', {})

        if created:

            return obj, True, False

        else:

            try:

                params = dict(

                    [(k, v) for k, v in kwargs.items() if '__' not in k])

                params.update(defaults)

                for attr, val in params.items():

                    if hasattr(obj, attr):

                        setattr(obj, attr, val)

                sid = transaction.savepoint()

                obj.save(force_update=True)

                transaction.savepoint_commit(sid)

                return obj, False, True

            except IntegrityError, e:

                transaction.savepoint_rollback(sid)

                try:

                    return self.get(**kwargs), False, False

                except self.model.DoesNotExist:

                    raise e

    update_or_create = _update_or_create

    objects = ExtendedManager()

    objects = ExtendedManager()