Get the _id of inserted document in Mongo database in NodeJS

Question

I use NodeJS to insert documents in MongoDB. Using collection.insert I can insert a document into database like in this code:

// ...
collection.         


        

Answer 1

Another way to do it in async function :

const express = require('express')
const path = require('path')
const db = require(path.join(__dirname, '../database/config')).db;
const router = express.Router()

// Create.R.U.D
router.post('/new-order', async function (req, res, next) {

    // security check
    if (Object.keys(req.body).length === 0) {
        res.status(404).send({
            msg: "Error",
            code: 404
        });
        return;
    }

    try {

        // operations
        let orderNumber = await db.collection('orders').countDocuments()
        let number = orderNumber + 1
        let order = {
            number: number,
            customer: req.body.customer,
            products: req.body.products,
            totalProducts: req.body.totalProducts,
            totalCost: req.body.totalCost,
            type: req.body.type,
            time: req.body.time,
            date: req.body.date,
            timeStamp: Date.now(),

        }

        if (req.body.direction) {
            order.direction = req.body.direction
        }

        if (req.body.specialRequests) {
            order.specialRequests = req.body.specialRequests
        }

        // Here newOrder will store some informations in result of this process.
        // You can find the inserted id and some informations there too.
        
        let newOrder = await db.collection('orders').insertOne({...order})

        if (newOrder) {

            // MARK: Server response
            res.status(201).send({
                msg: `Order N°${number} created : id[${newOrder.insertedId}]`,
                code: 201
            });

        } else {

            // MARK: Server response
            res.status(404).send({
                msg: `Order N°${number} not created`,
                code: 404
            });

        }

    } catch (e) {
        print(e)
        return
    }

})

// C.Read.U.D


// C.R.Update.D


// C.R.U.Delete



module.exports = router;