Using multer error on application launch

Question

Im has a node application with an expression that uses the multer module https://github.com/expressjs/multer

in the file app.jsI put the following:

var mulStorage = require("./utils/store"),
    var upload = multer({
        storage: mul.storage,
        dest: 'uploads/'
    });
    app.use(upload.single('file'));

The file is store.jsas follows

var multer = require('multer');

var stor = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, './uploads/')
    },
    filename: function (req, file, cb) {
        var filename = file.originalname;
        var fileExtension = filename.split(".")[1];
        cb(null, Date.now() + "." + fileExtension);
    }
})
module.exports = {
    stor: stor
}

When I run a query using a mailbox, I received the following error:

Error: ENOENT: there is no such file or directory, open 'C: \ Users \ c45669 \ WebstormProjects \ App \ downloads \ 1454935327214.zip'
  on error (native)

Why doesn't multer create a folder if it does not exist?

If I create a download folder in the root directory manually , this works ...

BTW, storage: mul.storage, , ...

    var upload = multer({
        //storage: mul.storage,
        dest: 'uploads/'
    });

dest multer , ...

Answer 1

multer , ?

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Answer 2

, - ,

var storage = multer.diskStorage({
 destination: function (req, file, cb) {
 cb(null, 'this is not just /uploads do it like /var/www/....') thank you!!
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now())
}
})
var upload = multer({ storage: storage });