def get_last_tid(self):
        try:
            spec = {'tid': {'$gt': 0}}
            sort = [('tid', -1)]
            row = self.db.docs.find_one(spec, sort=sort)
        except Exception as e:
            raise DatabaseException(e)
        if row:
            return row['tid']
        return 0
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)