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_validate_question_reviewer_count_fails_for_non_integer_count(
            self):
        community_contribution_stats = (
            suggestion_services.get_community_contribution_stats()
        )
        community_contribution_stats.question_reviewer_count = (
            self.non_integer_count
        )

        with self.assertRaisesRegex(
            utils.ValidationError,
            'Expected the question reviewer count to be an integer, '
            'received: %s.' % (
                community_contribution_stats.question_reviewer_count)
        ):
            community_contribution_stats.validate()