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 _assert_community_contribution_stats_is_in_default_state(self):
        """Checks if the community contribution stats is in its default
        state.
        """
        community_contribution_stats = (
            suggestion_services.get_community_contribution_stats()
        )

        self.assertEqual(
            (
                community_contribution_stats
                .translation_reviewer_counts_by_lang_code
            ), {})
        self.assertEqual(
            (
                community_contribution_stats
                .translation_suggestion_counts_by_lang_code
            ), {})
        self.assertEqual(
            community_contribution_stats.question_reviewer_count, 0)
        self.assertEqual(
            community_contribution_stats.question_suggestion_count, 0)