为什么我会收到此 hgetall 类型错误？

Question

这里是有问题的代码：

let key = "player:"+player_id;
console.log(key);
console.log(typeof(key));

redisClient.hgetall(key, function (err, result) {

if (err) { 
console.log(err);
res.end(false);
}

console.log("this is the reply");
console.log(result);
res.end(result);
});

这是 console.log 输出和错误：

player:5db138fdc0
string
this is the reply
{ name: 'Noah' }
_http_outgoing.js:739
      throw new TypeError('First argument must be a string or Buffer');
      ^

TypeError: First argument must be a string or Buffer
    at ServerResponse.end (_http_outgoing.js:739:13)
    at Command.callback (/home/noah/http_service/index.js:228:21)
    at normal_reply (/home/noah/http_service/node_modules/redis/index.js:726:21)
    at RedisClient.return_reply (/home/noah/http_service/node_modules/redis/index.js:824:9)
    at JavascriptRedisParser.returnReply (/home/noah/http_service/node_modules/redis/index.js:192:18)
    at JavascriptRedisParser.execute (/home/noah/http_service/node_modules/redis-parser/lib/parser.js:574:12)
    at Socket.<anonymous> (/home/noah/http_service/node_modules/redis/index.js:274:27)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)

typeof 调用显示它是一个字符串，所以我真的为下一步应该做什么而摸不着头脑。

Answer 1

好的，结果不是字符串格式。所以，我在 res.end() 中使用了 JSON.stringify()。我应该对结果而不是键使用 typeof() 调用。