How to File Upload using MongoDB in Node JS?




How to File Upload using MongoDB in Node JS?

Hello Friends,

This post is focused on how to file upload using MongoDB in node js. This article will give you a simple example of uploading files in MongoDB with mongoose grids and nodejs. This article goes into detail on crud operations and file upload using node.js and MongoDB. I explained simply how to upload/store images in MongoDB using node.js. you will do the following things for express & multer.

Upload the image file to MongoDB using node js; In this tutorial, you will learn how to upload an image file in the MongoDB database using Node js + Express + mongoose. And as well as learn how to store files/images in node js + express application directory and MongoDB database + mongoose.

Step 1: Create Node Express js App

Execute the following command on the terminal to create the node js app:

mkdir my-app

cd my-app

npm init -y

Step 2: Install express ejs body-parser mongoose Multer Modules

Execute the following command on the terminal to express ejs body-parser mongoose dependencies:

npm install -g express-generator

npx express --view=ejs

npm install

npm install body-parser --save

npm install express multer --save

npm install mongoose

body-parser – Node.js request body parsing middleware which parses the incoming request body before your handlers, and makes it available under req.body property. In other words, it simplifies incoming requests.

Express-EJS– EJS is a simple templating language which is used to generate HTML markup with plain JavaScript. It also helps to embed JavaScript to HTML pages

Mongoose – Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Mongoose supports both promises and callbacks.

Multer – Multer is a node.js middleware for handling multipart/form-data , which is primarily used for uploading files. It is written on top of the busboy for maximum efficiency.

Step 3: Connect App to MongoDB

Create a database.js file in your app root directory and add the following code into it to connect your app to the MongoDB database:

var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost:27017/node-file-upl', {useNewUrlParser: true});

var conn = mongoose.connection;

conn.on('connected', function() {

console.log('database is connected successfully');



console.log('database is disconnected successfully');


conn.on('error', console.error.bind(console, 'connection error:'));

module.exports = conn;

Step 4: Create Model

Create Models directory and inside this directory create imageModel.js file; Then add following code into it:

const mongoose = require("../database");

var mongoose = require('mongoose');

var imageSchema = new mongoose.Schema({

name: String,

desc: String,



data: Buffer,

contentType: String



//Image is a model which has a schema imageSchema

module.exports = new mongoose.model('Image', imageSchema);

Step 5: Create File/Image Upload HTML Markup Form

Create file/image upload Html form for uploading images or files in MongoDB database; So visit views directory and create an index.ejs file inside it. Then add the following code into it:

<!DOCTYPE html>

<html lang="en">


<meta charset="UTF-8">

<meta name="viewport" content="width=device-width, initial-scale=1.0">

<title>How to File Upload using MongoDB in Node JS? -Nicesnippets-com</title>



<h1>Upload Image</h1>

<form action="/uploadphoto" enctype="multipart/form-data" method="POST">

<input type="file" name="myImage" accept="image/*">

<input type="submit" value="Upload Photo">




Step 6: Import Modules in App.js

Import express, body-parser, mongoose, multer dependencies in app.js; as shown below:

const express = require("express");

const app = express();

const bodyParser = require("body-parser");

const path = require('path');

const fs = require("fs");

const multer = require("multer");

const mongoose = require("mongoose");

var imageModel = require('../models/imageModel');


{ extended:true }


app.set("view engine","ejs");


var storage = multer.diskStorage({

destination: function (req, file, cb) {

cb(null, 'uploads')


filename: function (req, file, cb) {

cb(null, file.fieldname + '-' +



var upload = multer({ storage: storage })




var img = fs.readFileSync(req.file.path);

var encode_img = img.toString('base64');

var final_img = {


image:new Buffer(encode_img,'base64')







console.log("Saved To database");






//Code to start server

app.listen(3000,function () {

console.log("Server Started at PORT 2000");


Step 7: Start App Server

You can use the following command to start the node js app server:

//run the below command

npm start

after run this command open your browser and hit

I hope it can help you...

#Node JS