Getting this error on trying to update....mongoose is throwing this error on using the code below....have tried using const project = {...} instead of new Product({...}) but no luck.
router.put("/:id", multer({storage: storage}).single("image") , (req, res, next) => {
let imagePath = req.body.imagePath;
if (req.file) {
const url = req.protocol + "://" + req.get("host");
imagePath = url + "/images/" + req.file.filename
}
const product = new Product(
{
_id: req.body.id,
title: req.body.title,
cost: req.body.cost,
description: req.body.description,
imagePath: imagePath
}
) ;
console.log(product)
Product.updateOne({_id: req.params.id}, product)
.then(result => {
console.log(result);
res.status(200).json({ message: "Update Successful !!"});
});
});
You need to remove the key _id from the object that is being used for updating the document.
const product = new Product(
{
title: req.body.title,
cost: req.body.cost,
description: req.body.description,
imagePath: imagePath
}
) ;
This will solve your problem.
Thing is, while doing an update on the document whose _id matches with the one you passed in your code,
Product.updateOne({_id: req.params.id}, product)
you are trying to update the value of _id field as well. _id by default is immutable which means it can not be updated, as it represents the uniqueness of the document.
Edit: If you need to update the _id of the document as well, then you can take a reference from here to do this. Though the _id can not be updated directly, but there is a workaround for doing that.
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