js mongodb _id

const { MongoClient, ObjectId } = require('mongodb');

async function insertDocument() {
  const uri = 'your_mongodb_connection_string';
  const client = new MongoClient(uri);

  try {
    await client.connect();
    const database = client.db('testdb');
    const collection = database.collection('testcollection');

    // 使用默认的 ObjectId
    const doc1 = { name: 'Alice' };
    await collection.insertOne(doc1);

    // 使用自定义的字符串作为 _id
    const doc2 = { _id: 'custom_id_123', name: 'Bob' };
    await collection.insertOne(doc2);
  } finally {
    await client.close();
  }
}

insertDocument().catch(console.error);

async function findDocumentById(id) {
  const uri = 'your_mongodb_connection_string';
  const client = new MongoClient(uri);

  try {
    await client.connect();
    const database = client.db('testdb');
    const collection = database.collection('testcollection');

    // 如果 id 是字符串，需要转换为 ObjectId
    const query = typeof id === 'string' ? { _id: new ObjectId(id) } : { _id: id };
    const document = await collection.findOne(query);
    console.log(document);
  } finally {
    await client.close();
  }
}

findDocumentById('custom_id_123').catch(console.error);