upload multiple files using multerS3 and NodeJs - node.js

Question

I've been trying for days but can't seem to figure out where I'm going wrong. My code works for a single file upload in a local folder but can't seem to upload multiple files even if I use upload.array() and req.files in multer and controller function respectively. Whereas when I try to upload a single/multiple files in my s3 bucket nothing gets uploaded at all. Below I'll also provide my model structure in case you need to see it.
::UPDATE::
The files are getting uploaded in s3 bucket but the database can't catch the file path. imagePath is coming blank inside database
route.js:
const ProductController = require('./../controllers/productController');
const appConfig = require("./../config/appConfig");
const multer = require('multer');
const aws = require('aws-sdk');
const multerS3 = require('multer-s3');
const path = require('path');
const s3 = new aws.S3({ accessKeyId: "***", secretAccessKey: "***" });
var upload = multer({
storage: multerS3({
s3: s3,
bucket: 'mean-ecom',
metadata: function (req, file, cb) {
cb(null, {fieldName: file.originalname + path.extname(file.fieldname)});
},
key: function (req, file, cb) {
cb(null, Date.now().toString())}})});
let setRouter = (app) => {
let baseUrl = appConfig.apiVersion;
app.post(baseUrl+'/post-product', upload.single('imagePath'), ProductController.postProduct)}
module.exports = {
setRouter: setRouter}
ProductController.postProduct:
const ProductModel = mongoose.model('Product')
let postProduct = (req, res) => {
let newProduct = new ProductModel({
imagePath: req.file && req.file.path})
newProduct.save((err, result) => {
if (err) { console.log('Error at saving new Product :: ProductController', err);
res.send(err);
} else {
console.log('Successfully saved new Product'); res.send(result) }
})}
productModel.js
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
let productSchema = new Schema(
{
imagePath: {
type: String,
default: '' }})
mongoose.model('Product', productSchema);

Answer 1

The first thing you need to do is change the model's imagePath property from a string to an array of strings, so you can store multiple images
const Schema = mongoose.Schema;
let productSchema = new Schema(
{
imagePath: {type: Array}
})
mongoose.model('Product', productSchema)
Then, in the router, you should use upload.any() (upload.array() should work the same way).
Finaly, if you want to store the files locations in the model array, you loop throw the files updating the model.
let postProduct = (req, res) => {
// We create a temporal array with the files locations
let files = [];
// We loop throw the req.files array and store their locations in the temporal files array
for (let i = 0; i < req.files.length; i++) {
let file = req.files[i].location
files.push(file)
}
let newProduct = new ProductModel({
imagePath: files}) //We create the model with the temp array
newProduct.save((err, result) => {
if (err) {
console.log('Error at saving new Product :: ProductController', err);
res.send(err);
}
else{
console.log('Successfully saved new Product');
res.send(result)
}
})