Update a document

Find a document with the property { greetings: 'Hellu' } and change it to { greetings: 'Whut?' }

const MongoClient = require('mongodb').MongoClient;

const url = 'mongodb://localhost:27017/test';

MongoClient.connect(url, function (err, db) {
    if (err) throw new Error(err);
    db.collection('myCollection').updateOne({ // Update method 'updateOne'
        greetings: "Hellu" }, 
        { $set: { greetings: "Whut?" }},
        function (err, result) {
            if (err) throw new Error(err);
            db.close(); // Don't forget to close the connection when you are done
        });
});

Collection method updateOne()

db.collection(collection).updateOne(filter, update, options. callback)

Parameter| Type |Description| —— | — |—— |filter | object | Specifies the selection criteraupdate | object | Specifies the modifications to applyoptions | object | (optional) Optional settings (default: null)callback | Function | Function to be called when the operation is done

The callback function takes two arguments

• err : Error - If an error occurs the err argument will be defined
• db : object - The MongoDB instance