使用用于express的mongoldb驱动程序在数组中查找文档

const express = require('express');
const mongodb = require('mongodb');

const app = express();
const MongoClient = mongodb.MongoClient;
const url = 'mongodb://localhost:27017'; // MongoDB连接URL

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

  // 在这里进行数组中查找文档的操作
});

const db = client.db('databaseName'); // 数据库名称
const collection = db.collection('collectionName'); // 集合名称

const searchElement = 'searchValue'; // 要查找的元素值

collection.find({ arrayField: searchElement }).toArray((err, documents) => {
  if (err) {
    console.error('Failed to find documents:', err);
    return;
  }
  
  console.log('Found documents:', documents);
});

app.get('/search', (req, res) => {
  collection.find({ arrayField: searchElement }).toArray((err, documents) => {
    if (err) {
      console.error('Failed to find documents:', err);
      return;
    }
    
    res.json(documents);
  });
});