Mongoose find documents where field = req.body.user - node.js

Question

I have a user schema and a post schema, wherein a user has many posts. I would like to return all posts that the user has on a route called '/post/dashboard'.
Here is my schemas:
let UserSchema = new Schema({
username: {
type: String,
required: true,
unique: true,
},
password: {
type: String,
default: null,
},
profile_pic: {
type: String,
default: '/img/profilepic.png',
},
posts: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Post'
}
})
let PostSchema = new Schema({
title: {
type: String,
},
description: {
type: String,
}
original_poster: {
type: Schema.Types.ObjectId,
ref: 'User',
required: true
},
tags: {
type: [String]
}
})
So, for example something like:
app.get('/', (req,res) => {
Post.find({ original_poster: req.session.user }).then((posts) =>{
res.send(JSON.stringify(posts));
}) //where req.session.user is an id (the logged in user's object id or _id)
})
Essentially in sql syntax it might be something like:
SELECT * FROM POSTS WHERE ORIGINAL_POSTER = <req.session.user>
What is the proper way to return all posts by the req.session.user?

Answer 1

It seems that original_poster field represent a reference to User's model, If req.session.user is stored as a string you have to cast it to objectID:
const mongoose = require('mongoose');
...
let userId = mongoose.Types.ObjectId(req.session.user);
Post.find({ original_poster: userId }).then((posts) => {
res.send(JSON.stringify(posts));
});