node.js - 注意插入新的子数组

Question

所以我有这个代码，可以在第一次尝试时保存，但是当用户访问另一个站点时，我需要它在历史数组下添加一个新的子数组。

注意:如果没有找到任何内容(意味着UUID，我仍然需要它.save)。

const userData = {"UUID": query.uuid, "ipaddress":ip, "history":[{"HID":hid,"station":req.params.stationname, starttime: starttimestamp}]};
                
     var listener = new Listeners(userData);            
     listener.save(function (err, book) {
      if (err) return console.error(err);
      console.log(book.UUID + " saved to collection.");
    });

正确的做法是什么？

我收到以下错误

{ MongoError: E11000 duplicate key error collection: AdStitchr.listeners index: UUID dup key: { UUID: "72296e08-2086-3b25-b66f-09fe14e7a1b9" }
    at Connection.<anonymous> (/root/adstichrplayer/node_modules/mongodb/lib/core/connection/pool.js:466:61)
    at emitTwo (events.js:126:13)
    at Connection.emit (events.js:214:7)
    at processMessage (/root/adstichrplayer/node_modules/mongodb/lib/core/connection/connection.js:384:10)
    at TLSSocket.<anonymous> (/root/adstichrplayer/node_modules/mongodb/lib/core/connection/connection.js:553:15)
    at emitOne (events.js:116:13)
    at TLSSocket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at TLSSocket.Readable.push (_stream_readable.js:208:10)
    at TLSWrap.onread (net.js:607:20)
  operationTime: Timestamp { _bsontype: 'Timestamp', low_: 1, high_: 1592964549 },
  ok: 0,
  errmsg: 'E11000 duplicate key error collection: AdStitchr.listeners index: UUID dup key: { UUID: "72296e08-2086-3b25-b66f-09fe14e7a1b9" }',
  code: 11000,
  codeName: 'DuplicateKey',
  keyPattern: { UUID: 1 },
  keyValue: { UUID: '72296e08-2086-3b25-b66f-09fe14e7a1b9' },
  '$clusterTime':
   { clusterTime: Timestamp { _bsontype: 'Timestamp', low_: 1, high_: 1592964549 },
     signature: { hash: [Object], keyId: [Object] } },
  name: 'MongoError',
  [Symbol(mongoErrorContextSymbol)]: {} }

当我使用时

const userData = {"UUID": query.uuid, "ipaddress":ip, "history":[{"HID":hid,"station":req.params.stationname, starttime: starttimestamp}]};
          
  Listeners.findOneAndUpdate(
    userData,
    { userData }, { upsert: true }, function(err) {
    if (err) {
        console.log('ERROR when submitting round');
        console.log(err);
    }
});

Answer 1

如果由于某种原因您只能访问变量userData，并且考虑到它的有效对象值为:

const userData = {"UUID": query.uuid, "ipaddress":ip, "history":[{"HID":hid,"station":req.params.stationname, starttime: starttimestamp}]}

你可以这样做:

Listeners.findOneAndUpdate(
    {"UUID": userData.UUID, "ipaddress":userData.ipaddress },
    { $push: { history: userData.history[0] } }, 
    { upsert: true }, function(err) {
    if (err) {
        console.log('ERROR when submitting round');
        console.log(err);
    }
});