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 on_fuzzing_range_end_changed(self, value: int):
        self.ui.sBAddRangeStart.setMaximum(value - 1)
        self.ui.sBAddRangeStep.setMaximum(value - self.ui.sBAddRangeStart.value())