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 test_set_translation_reviewer_count_for_lang_code_adds_new_lang_key(
            self):
        community_contribution_stats = (
            suggestion_services.get_community_contribution_stats()
        )
        self._assert_community_contribution_stats_is_in_default_state()
        (
            community_contribution_stats
            .translation_reviewer_counts_by_lang_code
        ) = {'en': 1}

        (
            community_contribution_stats
            .set_translation_reviewer_count_for_language_code('hi', 2)
        )

        self.assertDictEqual(
            (
                community_contribution_stats
                .translation_reviewer_counts_by_lang_code
            ),
            {'en': 1, 'hi': 2}
        )