MongoDB, update collection field if new value is not null

Question

I would update a collection setting the value only if the new values are not null. I have a code like this:

 ...
 var userName = req.body.nome;
 var userSurn         


        

Answer 1

The answer by Hüseyin BABAL is on the right track, but that will generate a warning from mongo because calling new User() will create a new _id which is immutable. What you want to do is the following:

const userModel = Object.assign(req.body);
User.update({_id: req.session.userID}, userModel, {upsert: true}, 
  function(err){
    console.log("Error occured!");
  });