Inesrt data into Nested Array (comment action) MongoDB - node.js

Question

I'm building a simple social platform; I'm currently building out the schema for commenting on a post, but users should be able to comment on other comments as well. So what I'm trying to do is, once a user comments on the post, a condition is being checked whether the postId params matches the post._id in the database, therefore this is a higher order comment action. Now if I were to comment on somebody else's comment, I would be checking whether the post._id matches the post as well as checking whether the comment._id matches as well, but I'm having issues by inserting it into the nested array.
Schema (POST)
onst mongoose = require('mongoose');
const Schema = mongoose.Schema;
const postSchema = new Schema({
uid: {
type: mongoose.Schema.Types.ObjectId,
required: true,
ref: "users",
},
uname: {type: String, required: true},
upic: {type: String, required: true},
message: { type: String,},
media: {type: String,},
likes:[],
comments:[],
commentCount: {type: Number, default: 0},
likeCount: {type: Number, default: 0},
repostCount: {type: Number, default: 0},
postedOn: { type: Date},
});
postSchema.pre('save', function(next){
this.postedOn = Date.now();
next();
});
var PostModel = mongoose.model('posts', postSchema);
module.exports = PostModel;
Controller (Comment)
{/* Higher order comment */}
module.exports.commentPost = async (req, res) => {
try{
await PostModel.findByIdAndUpdate(req.params.postId,
{
$push: {
comments: [{
_id: uuid.v1(),
postId: req.params.postId,
uid: req.user._id,
message: req.body.message,
postedOn: Date.now(),
uname: req.user.name,
upic: req.user.pic,
likes: [],
comments: [],
likeCount: 0,
commentCount: 0,
}]
},
$inc: { commentCount: 1}
}).exec((err,result)=>{
if(err){
return res.status(422).json({error:err})
}else{
res.json(result)
}
});
} catch(err){
throw new ErrorResponse(err, 404);
}
}
{/* Lower order comment */}
module.exports.commentCommentPost = async (req, res) => {
try{
await PostModel.findByIdAndUpdate({"_id": req.params.postId, "comments._id": req.body.commentId},
{
$push: {
comments: [{
comments: [{
_id: uuid.v1(),
postId: req.params.postId,
uid: req.user._id,
message: req.body.message,
postedOn: Date.now(),
uname: req.user.name,
upic: req.user.pic,
likes: [],
comments: [],
likeCount: 0,
commentCount: 0,
}]
}]
},
$inc: { commentCount: 1}
}).exec((err,result)=>{
if(err){
return res.status(422).json({error:err})
}else{
res.json(result)
}
});
} catch(err){
throw new ErrorResponse(err, 404);
}
}
I must be doing something wrong by updating the nested array within a nested array, any help would be appreciated.

Answer 1

I was able to fix the issue, here is the solution on what I've done, which works perfectly fine now.
module.exports.commentCommentPost = async (req, res) => {
try{
await PostModel.update({_id: req.params.postId, 'comments._id': req.body.commentId},
{
$push: {
'comments.$.comments': {
_id: uuid.v1(),
postId: req.params.postId,
uid: req.user._id,
message: req.body.message,
postedOn: Date.now(),
uname: req.user.name,
upic: req.user.pic,
likes: [],
comments: [],
likeCount: 0,
commentCount: 0,
}
}
}).exec((err,result)=>{
if(err){
return res.status(422).json({error:err})
}else{
res.status(200).json(result)
}
});
} catch(err){
throw new ErrorResponse(err, 404);
}
}