如何使用nodejs在mongodb的两个不同集合中搜索值

const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017'; // MongoDB连接URL
const dbName = 'your_database_name'; // 数据库名称

MongoClient.connect(url, function(err, client) {
  if (err) {
    console.error('Failed to connect to MongoDB:', err);
    return;
  }

  const db = client.db(dbName);
  // 在这里执行搜索操作
});

const collection1 = db.collection('collection1');
const collection2 = db.collection('collection2');

const query = { key: 'value' }; // 搜索条件
collection1.find(query).toArray(function(err, result) {
  if (err) {
    console.error('Failed to search in collection1:', err);
    return;
  }

  console.log('Search result in collection1:', result);
});

const query = { key: 'value' }; // 搜索条件
collection2.find(query).toArray(function(err, result) {
  if (err) {
    console.error('Failed to search in collection2:', err);
    return;
  }

  console.log('Search result in collection2:', result);
});