How can I use a cursor.forEach() in MongoDB using Node.js?

Question

I have a huge collection of documents in my DB and I\'m wondering how can I run through all the documents and update them, each document with a different value.

Answer 1

let's assume that we have the below MongoDB data in place.

Database name: users
Collection name: jobs
===========================
Documents
{ "_id" : ObjectId("1"), "job" : "Security", "name" : "Jack", "age" : 35 }
{ "_id" : ObjectId("2"), "job" : "Development", "name" : "Tito" }
{ "_id" : ObjectId("3"), "job" : "Design", "name" : "Ben", "age" : 45}
{ "_id" : ObjectId("4"), "job" : "Programming", "name" : "John", "age" : 25 }
{ "_id" : ObjectId("5"), "job" : "IT", "name" : "ricko", "age" : 45 }
==========================

This code:

var MongoClient = require('mongodb').MongoClient;
var dbURL = 'mongodb://localhost/users';

MongoClient.connect(dbURL, (err, db) => {
    if (err) {
        throw err;
    } else {
        console.log('Connection successful');
        var dataBase = db.db();
        // loop forEach
        dataBase.collection('jobs').find().forEach(function(myDoc){
        console.log('There is a job called :'+ myDoc.job +'in Database')})
});