def unmarshal(self, v):
        if not isinstance(v, date):
            # 2012-12-13
            v = datetime.strptime(v, "%Y-%m-%d").date()
        return v
When saving a tenant that has the flag auto_create_schema as
dataset/ETHPy150Open hozn/stravalib/stravalib/attributes.py/DateAttribute.unmarshal--crossover with--dataset/ETHPy150Open tomturner/django-tenants/django_tenants/tests/test_tenants.py/TenantDataAndSettingsTest.test_non_auto_sync_tenant