How to update document in MongoDB through Mongoose - node.js

Question

I am trying to update my document field with the following code, but I catch an error "Cannot GET /updation".
My code:
router.put('/updation', (req, res) => {
const query = { email: "babra#arzepak.com" };
const newEmail = { $set: { name: "babra", email: "nadralatif952#gmail.com" } };
Registration.updateOne()
.then((registration) => {
console.log("updating");
res.render('index', { title: 'updating registrations', registrations });
})
.catch(() => {
res.send('Sorry! Something went wrong.');
});
});

Answer 1

send a request with PUT method and you didn't use of query and newEmail as arguments for updateOne() pass them, and in new version of mongoose you don't need to $set for updating so change your code like this :
router.put('/updation', (req, res) => {
const query = { email: "babra#arzepak.com" }
const newEmail = { name: "babra", email: "nadralatif952#gmail.com" }
Registration.updateOne(query,newEmail)
.then((registration) => {
console.log("updating")
res.render('index', { title: 'updating registrations', registrations });
})
.catch(() => { res.send('Sorry! Something went wrong.'); });
})

Answer 2

Wrong Method
In your router you registered a route '/updation' for PUT method.
Hence only request with method PUT will be handled by your router. The error Cannot GET /updation means you are trying to handle a request with GET method which is simply not registered by your router.
A - If this code is supposed to get triggered when you visit the page via browser, then you should register the route for GET method, like router.get('/updation', ... ),
or
B - If this code is supposed to run seperate from your view (like a REST API should), then use a PUT request and end the request inside your router with res.status(200).json(yourdata)
📑 Sidenote :
It looks like you did not completely setup your mongoose query, I mean you defined the query but you don't use it in the database request. To use the defined query you propbably should change your code, according to the mongoose docs : https://mongoosejs.com/docs/api/model.html#model_Model.updateOne . I am not including a specific code example here, since it's not part of the question.