How to write mongoose schema with nested objects?

Question

MongoDB

Hello everyone, I have a post scheme, inside it there is an array with posts, inside the post there is an array with likes

const {
    Schema,
    model,
    ObjectId,
} = require('mongoose');


const likeSchema = new Schema({
    id: {type: ObjectId},
    userId: {type: ObjectId},
    userName: {type: String},
    userLastName: {type: String},
})

const postElementSchema = new Schema({
    id: {type: ObjectId},
    date: {type: String},
    time: {type: String},
    content: {type: String},
    likes: [likeSchema]
})

const PostSchema = new Schema({
    id: {type: ObjectId},
    userName: {type: String},
    userLastName: {type: String},
    userAvatar: {type: String},
    posts: [postElementSchema]
});

module.exports = model('Post', PostSchema);

the structure should be something like this, but it doesn't work (
if I do this

const PostSchema = new Schema({
    id: {type: ObjectId},
    userName: {type: String},
    userLastName: {type: String},
    userAvatar: {type: String},
    posts: {type: Array}
});

then everything is fine, but I need to describe nested arrays so that I can edit nested objects like this

const likeParams = (args) => {
    return {
        id: uuidv4(),
        userId: args.userId,
        userName: args.userName,
        userLastName: args.userLastName,
    }
}
 const postsData = await MongoosePost.findOne({id: args.ownersId})
        postsData.posts.filter(async (post)=> {
            if(post.id === args.postId){
               post.likes.unshift(likeParams(args))
                await post.save()
     return post
            }
        })

does not work without typing nested objects

Answer 1

In such a case, you'd be better off not storing nested objects, but using references and $lookup(populate in mongoose).
Also read about virtuals, localFieldand foreignField.
And yes, what is the point of separating Post and Posts?