store/display an image in mongodb using mongoose/express

storeImgInMongoWithMongoose.js

/**
 * Module dependencies
 */

var express = require('express');
var fs = require('fs');
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

// img path
var imgPath = '/path/to/some/img.png';

// connect to mongo
mongoose.connect('localhost', 'testing_storeImg');

// example schema
var schema = new Schema({
    img: { data: Buffer, contentType: String }
});

// our model
var A = mongoose.model('A', schema);

mongoose.connection.on('open', function () {
  console.error('mongo is open');

  // empty the collection
  A.remove(function (err) {
    if (err) throw err;

    console.error('removed old docs');

    // store an img in binary in mongo
    var a = new A;
    a.img.data = fs.readFileSync(imgPath);
    a.img.contentType = 'image/png';
    a.save(function (err, a) {
      if (err) throw err;

      console.error('saved img to mongo');

      // start a demo server
      var server = express.createServer();
      server.get('/', function (req, res, next) {
        A.findById(a, function (err, doc) {
          if (err) return next(err);
          res.contentType(doc.img.contentType);
          res.send(doc.img.data);
        });
      });

      server.on('close', function () {
        console.error('dropping db');
        mongoose.connection.db.dropDatabase(function () {
          console.error('closing db connection');
          mongoose.connection.close();
        });
      });

      server.listen(3333, function (err) {
        var address = server.address();
        console.error('server listening on http://%s:%d', address.address, address.port);
        console.error('press CTRL+C to exit');
      });

      process.on('SIGINT', function () {
        server.close();
      });
    });
  });

});

At line 43, instead of

  var server = express.createServer();

I would rather use

  var server = express();

. In this context, see, also https://stackoverflow.com/questions/13499010/nodejs-express-launching-my-app-express-createserver-is-deprecated.

Hi, I am using nodejs=mongodb. for the image upload, I want to give max size 5MB or 6MB. How can I do that? Can anyone tel me please..

here is my schema. for the coverImage, it allows max only 40kb size to upload the image but now I want to make it to 5MB.

 const nameSchema = Joi.object().keys({
description: Joi.string(), // .required(),
coverImage: Joi.string().Data: Buffer, // .required(), // ({ scheme: ['http', 'https'] }),
category: Joi.string(),
slug: Joi.string().regex(/^[a-z][a-z0-9-]*$/),
title: Joi.string(), // .required(),
price: Joi.number().integer(),
tag: Joi.object().keys({
    tag_name: Joi.string()
}),
publisher: Joi.object().keys({
    _id: Joi.string().hex().length(24),
    name: Joi.string().required()
}),
// published: Joi.string().isoDate().default(Date.now()),
rating: Joi.number().precision(2),
views: Joi.number().integer(),
hasErrors: Joi.boolean(),
allowSorting: Joi.boolean(),
allowAltered: Joi.boolean(),
choosetemplate: Joi.boolean(),
formErrors: Joi.object().keys({
    title: Joi.string(),
    description: Joi.string()
}),
includeCompleted: Joi.boolean(),
created_at: Joi.date().default(Date()),

});

@kathar1223
Your solution doesn't store image in db only path to that image.
Am I right?

Output of the db.as.find().pretty() gives very very long string. So do you think it is better to store user details in diffrent collection then its avatar?

Is there any dependency of it?

works fine in localhost but fileread is not working in server
`events.js:160
throw er; // Unhandled 'error' event
^

Error: ENOENT: no such file or directory, open 'file:///Users/rda/Desktop/Appointment Booking.png'
at Error (native)
at Object.fs.openSync (fs.js:640:18)
at Object.fs.readFileSync (fs.js:508:33)`

Seems to me this is one of hardest back-end topics.

So the working example to store image to local directory @TarunKashyap18 provided has few things to be noted:

• to run the project: $ node app.js

• the localhost its listening to is localhost:8000 instead of localhost:3000 noted in the comment (possibly didnt change much from the blog by @kathar1223.

• to test the result: first open localhost:8000 to upload a random image; then open http://localhost:8000/images to check the _id of the stored image; to check the image: open http://localhost:8000/picture/(the _id you just checked)

---

A revised sample with detailed README could be found here

Thanks a ton. I was searching a way to store files in mongo db for days.

I can't thank you enough.

thanks for this, it really helped me

Is there a way to find the path of the file and upload the file from the computer system ? I am trying to use the above mentioned code for storing images without using some extra package like Multer/Formidable etc. The code works fine if a static path is being used, but I wanted to check if someone can help me here to find the path dynamically.

@mukulbawa .. I think you could find the path from Client side / browser

Thank you!

Is it possible to send all the images in the folder to the database?

How did we figure out "Adding a default Image path to Mongoose Schema."