Cannot push in mongodb - node.js

Question

Im trying to create an API where users can create their fav movies and rate them.
So instead of creating a Movies array in user model, I created a Movie model with userId as an array. Now the logic is if there is a movie by the same name the new user is trying to create, it will not create a movie, rather it will push the userid and their rating. If there is no movie by that name it will create one. But I am stuck in that part. Any help will be hugely appreciated. Below im posting my code.
Movie model
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const movieSchema = new Schema({
title: {
type: String,
required: true,
},
rating: [
{ type: Number, required: true, max: 5 },
],
userId: [
{
type: String,
},
],
});
const Movie = mongoose.model(
'Movie',
movieSchema
);
module.exports = Movie;
user model
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const userSchema = new Schema({
name: {
type: String,
required: true,
},
age: {
type: Number,
required: true,
},
// list: {
// type: Array,
// default: [],
// },
});
const User = mongoose.model('User', userSchema);
module.exports = User;
movie route
const router = require('express').Router();
const User = require('../models/User');
const Movie = require('../models/Movies');
//creating a movie
router.post(
'/:id/createmovie',
async (req, res) => {
const { title, rating } = req.body;
const userId = req.params.id;
try {
const currentMovie = await Movie.findOne({
title,
});
if (currentMovie == null) {
const newMovie = new Movie({
title,
rating,
userId,
});
newMovie
.save()
.then((data) => res.json({ data }))
.catch((err) => {
res.status(400).json({ error: err });
});
}
currentMovie
.updateOne(
{ title },
{ $push: { userId, rating } }
)
.then((data) => res.json({ data }))
.catch((err) => {
res.status(400).json({ error: err });
});
} catch (err) {
console.log(err);
}
}
);
// router.post('/:id/createmovie', (req, res) => {
// const { title, rating } = req.body;
// const userId = req.params.id;
// Movie.findOne({ title }).then((data) => {
// console.log(data);
// res.json(data);
// if (data == null) {
// res.send('true');
// }
// res.send('false');
// if (data.title == title) {
// Movie.updateOne(
// { title },
// { $push: { userId, rating } }
// );
// }
// const newMovie = new Movie({
// title,
// rating,
// userId,
// });
// newMovie
// .save()
// .then((data) => res.json({ data }))
// .catch((err) => {
// res.status(400).json({ error: err });
// });
// });
// });
router.get('/getmovie', (req, res) => {
const { title } = req.body;
Movie.find({ title })
.then((data) => res.json(data[0].title))
.catch((err) => {
res.status(400).json({ error: err });
});
});
module.exports = router;

Answer 1

Change router.post function arguments
router.post(
'/:id/createmovie',
async (req, res) => {
const { title, rating } = req.body;
const userId = req.params.id;
try {
const currentMovie = await Movie.findOne({
title,
});
if (currentMovie == null) {
await Movie.insertOne({title ,rating, userId})
.
}
else{
await Movie.updateOne(
{ title },
{ $push: { userId, rating } }
)
}
} catch (err) {
console.log(err);
}
}
);