issue with multer not allowing a default image - node.js

Question

So I am having an issue with multer that i can't figure out. When I add an item with an image everything works with no issues but if I try to add an item with no image it fails. I have an if statement that will define a default image if req.file is undefined but it fails with the error saying req.file.filename is undefined ... Here is the code
Multer setup:
var storage = multer.diskStorage({
destination: function(req, file, callback) {
callback(null, "./public/uploads");
},
filename: function(req, file, callback) {
callback(null, Date.now() + file.originalname);
}
});
var upload = multer({ storage: storage }).single("file");
route:
router.post("/item/add", middleware.isLoggedIn, (req, res) => {
User.findById(req.user._id, (err, user) => {
upload(req, res, err => {
if (err) {
req.flash("error", "failed to upload file");
return res.redirect("/products");
}
var item = new Item();
item.name = req.body.name;
item.description = req.body.description;
item.price = req.body.price;
item.createdBy = { id: req.user._id, username: req.user.username };
if (typeof req.file === undefined) {
item.image = "/uploads/no-img.png";
} else {
item.image = "/uploads/" + req.file.filename;
}
item.save(function(err) {
if (err) {
res.send(err);
}
return res.redirect("/products");
});
});
});
});
So I guess my question is... How would I set this up where it wont fail with no image selected?

Answer 1

Your problem is here:
if (typeof req.file === undefined) {
typeof returns a string.
Your check should be if (typeof req.file === "undefined") {