webman中的think-orm 中的where写法存在问题

SELECT * FROM `region` WHERE  `level` IN (=,2) LIMIT 0,50

public static function getList($param)
    {
        $filter = [];
        if (isset($param['name']) && $param['name']) {
            $filter[] = ['name','like', "%{$param['name']}%"];
        }
        if (isset($param['level']) && $param['level']) {
            $filter[] = ['level','=', $param['level']];
        }
        $data['data'] = Db::table('region')
            ->where($filter)
            ->page($param['page'], $param['limit'])
            ->fetchSql(true)
            ->select();
        var_dump($data['data']);
        $data['count'] = Db::table('region')
            ->where($filter)
            ->count();
        return $data;
    }