My mongoose populate() function isnt working, I dont know why - node.js

Question

I'm trying to populate the content key of my posts model with the contents of my content collection but it isnt working. The content collection is getting populated but the data isnt getting passed to posts collection's content key.
Schemas:
const postsSchema = new mongoose.Schema({
_id: {
type: String,
required: true
},
title: {
type: String,
required: true
},
content: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Content' }]
})
const contentSchema = new mongoose.Schema({
_id: {
type: String,
required: true
},
subHeading: String,
subHeadingContent: String,
image: {
data: Buffer,
contentTyle: String
}
})
const content = mongoose.model("Content", contentSchema)
const posts = mongoose.model("Posts", postsSchema)
Post request to populate the collections:
// Write a new post
app.post("/create", function (req, res) {
let Posts = {
title: req.body.newTitle,
subheading: req.body.newSubHeading,
subheadingcontent: req.body.newSubHeadingContent
}
postsArray = [];
postsArray.push(Posts)
console.log(postsArray);
postsArray.forEach((post) => {
content.create({
_id: uuidv4(),
subHeading: post.subheading,
subHeadingContent: post.subheadingcontent
})
posts.create({
_id: uuidv4(),
title: post.title,
})
posts.find().populate('content').exec((err, posts) => console.log("populated: ", posts))
})
res.redirect("/overview");
})

Answer 1

You do not need to have a postsArray & a for loop since your only trying to create a post from a single object.
Anyways, the reason it's not showing up is because you need to push the content object to your posts array.
First, you give a variable to the content.create,
then you push the variable to the array when you're creating the post
app.post("/create", function (req, res) {
let post = {
title: req.body.newTitle,
subheading: req.body.newSubHeading,
subheadingcontent: req.body.newSubHeadingContent
}
const postContent = content.create({
_id: uuidv4(),
subHeading: post.subheading,
subHeadingContent: post.subheadingcontent
})
posts.create({
_id: uuidv4(),
title: post.title,
{ $push: { content: postContent } }
})
posts.find().populate('content').exec((err, posts) => console.log("populated: ", posts))
res.redirect("/overview");
})