多层查找和更新mongodb和nodejs

db.users.find({ "address.city": "Beijing" })

db.users.updateMany({ "address.city": "Beijing" }, { $set: { "address.zipCode": "100000" } })

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

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

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

  // 查询
  collection.find({ "address.city": "Beijing" }).toArray((err, docs) => {
    if (err) throw err;

    console.log(docs);
  });

  // 更新
  collection.updateMany({ "address.city": "Beijing" }, { $set: { "address.zipCode": "100000" } }, (err, result) => {
    if (err) throw err;

    console.log(result.modifiedCount);
  });

  // 关闭数据库连接
  client.close();
});