upload images with nodejs - node.js

Question

i have a user.js in model folder
const UserSchema = new mongoose.Schema({
name: {
type: String,
},
profile_pic: {
data: Buffer,
contentType: String
}
})
i want to upload a profile picture
and in the router folder i defined the storage using multer
const storage = multer.diskStorage({
destination: (req, file, callback) => {
callback(null, './images')
},
filename: (req, file, callback) => {
callback(null , Date.now()+ file.originalname)
}
})
const upload = multer({
storage : storage,
limits : {
fieldSize : 1024*1024*3
}
})
router.post('/image' , upload.single('image'),image)
using postman i tried to upload an image .. it uploaded successfully and stored in the defined folder (images)
but i want to store the image in the model too
how to store it in the controller folder user.js

Answer 1

Try the example below
const app = require("express")();
const multer = require('multer')
const firstLocation = multer.diskStorage({
destination: function (req, file, cb) {');
cb(null, './imagesFolder/')
},
filename: (req, file, callback) => {
callback(null , Date.now()+ file.originalname)
}
});
const secondLocation = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, './modelFolder/')
},
filename: (req, file, callback) => {
callback(null , Date.now()+ file.originalname)
}
});
const firstPath = multer({ storage: firstLocation })
const secondPath = multer({ storage: secondLocation })
function fileUpload(req, res, next) {
firstPath.single('file')(req, res, next);
secondPath.single('file')(req, res, next);
next();
}
app.post("/", fileUpload, (req, res) => {
res.send("Received file");
});
app.listen(3000, () => {
console.log("Server started");
});
If you run the above code and send a request to localhost:3000 then you will notice that two directories created named imagesFolder and modelFolder. Inside those folders, you will see the file that you have uploaded.
Updated answer in response to comments for Mongo schema,
const imagePath = '/path/to/myImage.jpg';
const imageUp = mongoose.model('imageUp', UserSchema);
mongoose.connection.on('open', function () {
imageUp.remove((err) => {
if (err) throw err;
const up = new imageUp;
up.img.data = fs.readFileSync(imagePath); // read from you folder
up.img.contentType = 'image/jpg'; // set the content tpe to image format
up.save((err, a) => { // save or upload image
if (err) throw err; // throws error if anything goes wrong
app.get('/', (req, res, next) => {
imageUp.findById(up, (err, doc) => { // fetch image from db by id and send in response as required.
if (err) return next(err);
res.contentType(doc.img.contentType);
res.send(doc.img.data);
});
});
}
Ref:- https://www.geeksforgeeks.org/upload-and-retrieve-image-on-mongodb-using-mongoose/