How can I use promises with MongoDB in my Node.js application?

How can I use promises with MongoDB in my Node.js application?

You can use the native MongoDB driver with promises by utilizing the async/await syntax or by chaining .then() and .catch() methods.

Can you show me a simple example of using promises with MongoDB?

Sure! Here's a basic example:

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

async function run() {
    const client = new MongoClient('mongodb://localhost:27017');
    try {
        await client.connect();
        const database = client.db('testdb');
        const collection = database.collection('testcollection');
        const result = await collection.insertOne({ name: 'Alice' });
        console.log(`New document created with the following id: ${result.insertedId}`);
    } finally {
        await client.close();
    }
}
run().catch(console.dir);

What if I want to handle errors in my promise chain?

You can handle errors using .catch() at the end of your promise chain. For example:

collection.insertOne({ name: 'Alice' })
    .then(result => {
        console.log(`New document created with the following id: ${result.insertedId}`);
    })
    .catch(err => {
        console.error('Error inserting document:', err);
    });

Are there any performance considerations when using promises with MongoDB?

Yes, while promises can improve code readability, be mindful of connection management and ensure you're not overwhelming the database with too many concurrent operations.