如何更新数组NodeJS，MongoDB中的特定对象

const MongoClient = require('mongodb').MongoClient;

MongoClient.connect('mongodb://localhost:27017', (err, client) => {
  if (err) throw err;

  const db = client.db('your_database_name');
  const collection = db.collection('users');

  collection.findOne({ username: 'your_username' }, (err, user) => {
    if (err) throw err;

    // 在这里进行更新操作
  });
});

collection.updateOne({ username: 'your_username' }, { $push: { your_array_field: 'new_element' } }, (err, result) => {
  if (err) throw err;

  console.log('数组已更新');
});

collection.updateOne({ username: 'your_username' }, { $pull: { your_array_field: 'element_to_remove' } }, (err, result) => {
  if (err) throw err;

  console.log('数组已更新');
});

collection.updateOne({ username: 'your_username' }, { $addToSet: { your_array_field: 'new_element' } }, (err, result) => {
  if (err) throw err;

  console.log('数组已更新');
});