Can I set the dest (upload folder) dynamically?

I’d like to upload files to different folder based on user id.

My code is:

const multer = require('multer')
const upload = multer({ dest: 'uploads/'})

app.get('/', function (req, res) {
  res.send('Image Extraction Server');
})

app.post('/upload', upload.array('photos',100), (req,res) => {   
  // get the user id from req
  // how can I change the dest path? 
  res.send('{"status":"ok"}')
})

Is this possible? Thanks.

[gireeshpunathil]

pasting the textual version of the same, so that people can copy-paste easily

const multer = require('multer')
const storage = multer.diskStorage({
destination: (req, file, cb) => {
  const { userId } = req.body
  const dir = ./uploads/${userId}
  fs.exists(dir, exist => {
  if (!exist) {
    return fs.mkdir(dir, error => cb(error, dir))
  }
  return cb(null, dir)
  })
},
filename: (req, file, cb) => {
  const { userId } = req.body
  cb(null, UserId-${userId}-Image-${Date.now()}.png)
}
})

const upload = multer({ storage })

[kuubson]