def forwards(self, orm):
        if not db.dry_run:
            for c in orm.Contract.objects.all():
                c.valid_till = c.end
                c.save()
Returns an iterator over the run indices that are not completed
dataset/ETHPy150Open hackerspacesg/hackdo/hado/migrations/0011_end_date_valid.py/Migration.forwards--crossover with--dataset/ETHPy150Open SmokinCaterpillar/pypet/pypet/environment.py/Environment._make_index_iterator