Mongoose deleting subdocuments from arrays using $pull - arrays

Question

Hi I have a comment and post model that has a one-to-many relationship. It successfully creates a comments array and pushes the object id correctly, but when I try to delete a comment using $pull It doesn't delete or show errors just returns the object back unchanged and also I'm not sure how to update subdocuments either , it doesn't work
In comment.js
const mongoose = require("mongoose");
const AutoIncrement = require('mongoose-sequence')(mongoose);
const CommentSchema = new mongoose.Schema({
username: {
type: String,
required: true,
},
content:{
type: String,
required: true
},
createdAt:{
type: Date,
default: new Date()
},
})
CommentSchema.plugin(AutoIncrement, {inc_field: 'commentID'});
module.exports = mongoose.model("Comment", CommentSchema);
In post.js
const mongoose = require("mongoose");
const AutoIncrement = require('mongoose-sequence')(mongoose);
const PostsSchema = new mongoose.Schema({
title: {
type: String,
required: true
},
content: {
type: String,
required: true
},
createdAt:{
type: Date,
default: new Date()
},
comments: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "Comment"
}
]
});
PostsSchema.plugin(AutoIncrement, {inc_field: 'postID'});
module.exports = mongoose.model("Post", PostsSchema);
For the routes
router.post("/:id/comments", CommentController.createComment)
router.get("/:id/comments", CommentController.viewComments)
router.delete("/:id/comments/:commentID", CommentController.deleteComment)
router.patch("/:id/comments/:commentID", CommentController.updateComment)
And the controllers
const commentsModel = require("../models/comments")
const PostsModel = require("../models/posts");
const mongoose = require("mongoose")
const objID = mongoose.Types.ObjectId;
async function createComment(req, res){
try{
const comment = await commentsModel.create(req.body)
const data = await PostsModel.findOneAndUpdate(
{postID: req.params.id},
{$push: {comments: objID(comment._id)}},
{ new: true, useFindAndModify: false }
)
res.status(200).json({data})
}catch (e) {
res.status(404).json(e.message)
}
}
async function viewComments(req, res){
try{
const data = await PostsModel.findOne({postID: req.params.id}).populate("comments");
if(!data){
return res.status(404).json({msg: "No data found"});
}
res.status(200).json({comments: data.comments});
}catch (e) {
res.status(500).json(e.message);
}
}
async function deleteComment(req, res){
try{
const post = await PostsModel.update({ postID: req.params.id },
{
'$pull': {
comments: {
_id: objID(req.params.commentID)
}
}
}, {new: true});
if (!post){
return res.status(404).json({msg: "No post found"});
}
res.status(200).json({post});
}catch (e) {
res.status(500).json(e.message);
}
}
async function updateComment(req, res){
try{
const post = await PostsModel.findOneAndUpdate(
{"postID": req.params.id, "comments._id": objID(req.params.commentID)},
{
"$set":{
"comments.$.username": req.body.username,
"comments.$.content": req.body.content
}
}
)
if (!post){
return res.status(404).json({msg: "No post found"});
}
res.status(200).json({post});
}catch (e) {
res.status(500).json(e.message);
}
}