def get_next_id(self):
        try:
            query = {'_id': 'last_id'}
            update = {'$inc': {'id': 1}}
            fn = self.db.internal.find_and_modify
            row = fn(query, update, upsert=True, new=True)
        except Exception as e:
            raise DatabaseException(e)
        return row['id']
def test_validation_for_handled_application_with_invalid_final_review(self):
        self.assertEqual(
            self.voiceover_application.status,
            suggestion_models.STATUS_IN_REVIEW)
        self.assertEqual(self.voiceover_application.final_reviewer_id, None)
        self.voiceover_application.validate()

        self.voiceover_application.status = suggestion_models.STATUS_ACCEPTED
        with self.assertRaisesRegex(
            utils.ValidationError, 'Expected final_reviewer_id to be a string'
        ):
            self.voiceover_application.validate()