Get timestamps of a newly created mongo document in mongoose (MERN) - node.js

Question

I'm working on a twitter clone to learn MERN stack, here's a new tweet route
router.route('/new')
.post( (req, res) => {
const { errors, isValid } = validateTweet(req.body);
if (!isValid) {
return res.status(400).json(errors);
}
let tweet = new Tweet({
content: req.body.content,
created_by: req.user.id
})
User.findById(req.user.id, (err, user) => {
if (err) return res.status(400).json(err)
user.tweets.push(tweet._id);
user.save();
});
tweet.save();
return res.status(201).json(tweet);
});
Which does not return timestamps for the tweet, how can i achieve this without querying the database for the tweet before returning it?
Here's the model just in case:
const tweetSchema = new Schema({
content: {
type: String,
required: true,
minlength: 1,
maxlength: 128,
trim: true
},
created_by: {
type: Schema.Types.ObjectId, ref: 'User',
required: true
}
}, {
timestamps: true
});
const Tweet = mongoose.model('Tweet', tweetSchema);

Answer 1

What i ended up doing was making the funcion async then returning the result of the fulfilled save(). Not sure if this is a good practice or not.
router.route('/new')
.post( async (req, res) => {
const { errors, isValid } = validateTweet(req.body);
if (!isValid) {
return res.status(400).json(errors);
}
let tweet = new Tweet({
content: req.body.content,
created_by: req.user.id
})
User.findById(req.user.id, (err, user) => {
if (err) return res.status(400).json(err)
user.tweets.push(tweet._id);
user.save();
});
tweet = await tweet.save();
return res.status(201).json(tweet);
});