How to update single and multiple documents in MongoDB using Node.js ?

MongoDB the most popular NoSQL database, is an open-source document-oriented database. The term ‘NoSQL’ means ‘non-relational’. It means that MongoDB isn’t based on the table-like relational database structure but provides an altogether different mechanism for storage and retrieval of data. This format of storage is called BSON (similar to JSON format). Refer (this) article.

MongoDB Module: This module of Node.js is used for connecting the MongoDB database as well as used for manipulating the collections and databases in MongoDB. The mongodb.connect() method is used for connecting the MongoDb database which is running on a particular server on your machine. (Refer to this article). We can also use promises in this method in resolve the object contains all the methods and properties required for collection manipulation and in reject the error occurs during connection.

Installing module:

node install mongodb

Project structure:

Running the server on Local IP:

mongod --dbpath=data --bind_ip 127.0.0.1

MongoDB Database:

Database:GFG
Collection:GFGcollections

Structure of GFG database:

Index.js:

const MongoClient = require("mongodb");
const url = 'mongodb://localhost:27017/';
const databasename = "GFG";   // Database name
MongoClient.connect(url).then((client) => {

    const connect = client.db(databasename);

    // Connect to collection
    const collection = connect
            .collection("GFGcollections");

    // Update one collection
    collection.updateOne(
        { "name": "saini" }, 
        { $set: { "class": "bye" } }
    );

    // Update multiple documents having
    // GFGNEW class
    collection.updateMany(
        { "class": "GFGNEW" }, 
        { $set: { "class": "GFG" } }
    );

    console.log("update successful");
}).catch((err) => {

    // Handling the error
    console.log(err.Message);
})

Output:

Updated MongoDb collection:

zack_aayush

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Article Tags :

• Technical Scripter
• Web Technologies
• Node.js
• MongoDB
• Technical Scripter 2020
• Node.js-Misc

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