upload files from different fields in a form using multer - node.js

Question

I have a document that contains two fields are of input type="file" and I want to upload both of these on submit.
This post method giving me internal server error 500 on uploading two files but when I upload one file, it is OK.
router.post('/', mediaFiles.uploadSingle('icon_url'), mediaFiles.uploadSingle('background_url'),
async (req, res) => {
name: req.body.name,
icon_url: req.file.path.replace(/\\/g, "/"), // req.file['icon_url']
background_url: req.file.path.replace(/\\/g, "/") // req.file['background_url']
})
you can ignore this MediaFiles class because it provides traditional code to upload images with multer
import multer from "multer";
import path from "path";
class MediaFiles {
private storage = multer.diskStorage({
destination: 'uploads/',
filename: function (req, file, callback) {
callback(
null,
file.originalname.replace(/\.[^/.]+$/, "") + '-' + Date.now() + path.extname(file.originalname))
}
})
uploadSingle(fieldName?: string) {
try {
return multer({
storage: this.storage,
limits: { fileSize: 1024 * 1024 * 1 }, // 1MB = 1024 * 1024 * 1
fileFilter: function (req, file, callback) {
const fileTypes = /jpeg|jpg|png/;
const extName = fileTypes.test(path.extname(file.originalname).toLowerCase());
const mimeType = fileTypes.test(file.mimetype);
if (extName && mimeType) {
callback(null, true)
} else {
callback(new Error('Error: Images Only!'), null)
}
}
}).single(fieldName);
} catch (err) {
console.log(err.message)
}
}
}
export default new MediaFiles();

Answer 1

I don't think you could have two multer objects, I was having the same problem and here is what worked for me.
const storage = multer.diskStorage()
const mediaFiles = multer({
storage:storage })
.fields([{ name: 'icon_url', maxCount: 1 }, { name: 'background_url', maxCount: 1 } ]
router.post('/', mediaFiles, async (req, res) => {
console.log(req.files) // req.files is an array of files
}