Nsryjdtyk

My Post method works and successfully creates an object in my database. The following is what is shown in my database after I used the post method once in my MEAN stack.

[

    {

        "_id": "5befb0570a2c4185be51899a",

        "username": "a",

        "gender": "Female",

        "rating": 4,

        "location": [

            -121.88701271769105,

            37.35748094112163

        ],

        "__v": 0,

        "updated_at": "2018-11-17T06:08:23.577Z",

        "created_at": "2018-11-17T06:08:23.564Z"

    }

]



// Provides method for saving new users in the db

app.post('/users', function(req, res) {



  // Creates a new User based on the Mongoose schema and the post bo.dy

  var newuser = new User(req.body);



  // New User is saved in the db.

  newuser.save(function(err) {

   if (err)

    res.send(err);



  // If no errors are found, it responds with a JSON of the new user

   res.json(req.body);

 });

});

Now I am trying to get the put method to work to update the object and change it's rating to 5 in my database. I've been googling for hours and am really lost on the put method. Below was something I tried to get from a tutorial but it isn't working at all,

app.put('/users', (req, res) => {

    db.bathrooms('users')

      .findOneAndUpdate({

        username: 'a'

      }, {

        $set: {

          rating: req.body.rating

        }

      }, {

        sort: {

          _id: -1

        },

        upsert: true

      }, (err, result) => {

        if (err) return res.send(err)

        res.send(result)

      })

  })