Raspberry Pi: MongoDB with Node.js

mkdir test-mongodb && cd test-mongo-db
npm init

npm install mongodb

Just in case, the script is running under node.js version 20.15 and mongodb module version 6.8 (current on moment of writing). To check the versions:

node -v

and to check the module version use whatever you like

npm info mongodb version
npm view mongodb version
npm list | grep mongodb

Sorry, it might be looked a little bit messy, but the script provides a connection, up to 4 insertions, retrieval, drop/deletion, and start over.

Source: Node Driver Quick Start

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

// Connection URL with the database name
const url = 'mongodb://127.0.0.1:27017/mydb';

// Create a new MongoClient
const client = new MongoClient(url);

async function main() {
    try {
        // Use connect method to connect to the Server
        await client.connect();
        console.log("Connected successfully to server");

        const db = client.db('mydb');
        const col = db.collection("customers");

//        const result = await db.collection("customers").deleteMany();
        // Print the number of deleted documents
//        console.log("Deleted " + result.deletedCount + " documents");
        // Print a message if no documents were found

        if ((await col.countDocuments()) > 4) {
            const result = await col.deleteMany();
        }

        var myobj = { name: "New name", address: "somebody's address" };
        res = await col.insertOne(myobj);
        console.log(`A document was inserted with the _id: ${res.insertedId}`);

//        customers = await db.collection("customers").findOne()
//        console.log(customers);
        const cursor = col.find();

        // Print a message if no documents were found
        if ((await col.countDocuments()) === 0) {
          console.log("No documents found!");
        }

        // Print returned documents
        const results = await cursor.toArray();
        console.log(results);
// or
//        for await (const doc of cursor) {
//          console.log(doc);
//        }
    } catch (err) {
        console.log(err);
    } finally {
        await client.close();
    }
}

main();