Synnefo

        AstakosUser = orm["im.astakosuser"]

        users = AstakosUser.objects.filter(

            models.Q(moderated=False) |

            models.Q(moderated=True, is_rejected=True))

        uuids = set(users.values_list("uuid", flat=True))

        # no usage

        holdings = orm.Holding.objects.filter(holder__in=uuids)

        empty = len(holdings.filter(usage_min=0, usage_max=0))

        if empty:

            print "Deleting %s empty holdings" % empty

        holdings.filter(usage_min=0, usage_max=0).delete()

        # with usage

        hs = holdings.all()

        for h in hs:

            print "Warning: Deleting non-empty holding: %s, %s" % (h.holder,

                                                                   h.resource)

        holdings.all().delete()