Redirect to new Mongo Saved ID after Express POST?

Of course you can.

The save() method can accept a callback so you can get the _id field of the saved document.

One way of do it would be:

newItem.save((err, itemSaved) => {    if(err) {        next(err);    }    const itemId = itemSaved._id;    res.redirect('/results/' + itemId);});

Hopefully, this will solve your problem.

P.S.

There's no need to use a colon on redirect's path. Beware with that, 'cause using it will give you a Cast Error.

CodeHunter