Sort by reverse order mongoose

Hi, I am trying to return my query in backwards order from which it was created.
The docs are a little unclear on how to use the sort method:

Here is my schema:

const mongoose = require('mongoose'), Schema = mongoose.Schema, ObjectId = Schema.Types.ObjectId;
let PostSchema = new Schema({ title : String, description: String, image : String, tags : [String], original_poster: { type: Schema.Types.ObjectId, ref: 'User', required: true }, date: { type: Date, default: new Date() }
})
module.exports = mongoose.model('Post',PostSchema);

I have run,

db.posts.find().sort({date:-1}).pretty()

For example, if my model was a 'Post' model and my first post was 'hello world' and my second post was 'this is a post'. I would like to see:

 ['this is a post', 'hello world']

However, what I am actually seeing is ['hello world','this is a post']

2 Answers

Figured out the answer

in posts schema add:

date: { type: Date, default: Date.now
}

then db.posts.find().sort({date:-1}).pretty() will yield the posts sorted from most recent to least recent

You have to add a creation timestamp in your schema and sort by its key.

let PostSchema = new Schema({ title : String, description: String, date : Date, // Here is your date image : String, tags : [String], original_poster: { type: Schema.Types.ObjectId, ref: 'User', required: true }
})

and when you insert a document, use:

date: new Date()