def filldb(self):
        '''Fill database
        '''
        from app import World, Fortune, odm, MAXINT

        mapper = odm.Mapper(self.cfg.postgresql)
        mapper.register(World)
        mapper.register(Fortune)
        mapper.table_create()

        with mapper.begin() as session:
            query = session.query(mapper.world)
            N = query.count()
            todo = max(0, MAXINT - N)
            if todo:
                for _ in range(todo):
                    world = mapper.world(randomNumber=randint(1, MAXINT))
                    session.add(world)

        if todo:
            odm.logger.info('Created %d World models', todo)
        else:
            odm.logger.info('%d World models already available', N)