从集合的单个文档中的对象数组中删除单个对象

// 连接到数据库并选择集合
const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017';
const dbName = 'mydb';
MongoClient.connect(url, function(err, client) {
  if (err) throw err;
  const db = client.db(dbName);
  const collection = db.collection('mycollection');

  // 查询包含要删除对象的文档
  const query = { _id: ObjectId('document_id') };
  collection.findOne(query, function(err, doc) {
    if (err) throw err;

    // 从对象数组中删除单个对象
    const objectToRemove = { name: 'object_name' };
    const update = { $pull: { objects: objectToRemove } };
    collection.updateOne(query, update, function(err, result) {
      if (err) throw err;

      // 确认更新操作是否成功
      console.log('对象已成功删除');
      client.close();
    });
  });
});