MongoDB save or update

saveOrUpdate.js

var query = {ean: productJson.ean},
            options = {upsert: true, new: true, setDefaultsOnInsert: true};
        Product.findOneAndUpdate(query, productJson, options, function (error, item) {
            if (!!error) {
                res.status(400).json(error)
            } else {
                res.status(201).json({"msg": "document created"})
            }
        });