def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def deactivate(cls):
        """
        Syntax sugar, return to public schema

        Usage:
            test_tenant.deactivate()
            # or simpler
            Tenant.deactivate()
        """
        connection = connections[get_tenant_database_alias()]
        connection.set_schema_to_public()