Add timestamp to a new subdocument or subschema in mongoose - node.js

Question

I have this document in mongo atlas
_id: 5f8939cbedf74e363c37dd86,
firstname: "Person",
lastname: "Person lastname",
sex: "Masculino",
age: "20",
birthDay: 2020-10-07T00:00:00.000+00:00,
vaccines: Array
0:Object
dose: Array
_id: 5f8939cbedf74e363c37dd87
vaccine:5f7023ad96f7ed21e85be521
createdAt:2020-10-16T06:12:27.726+00:00
updatedAt:2020-10-16T06:12:27.726+00:00
1:Object
dose:Array
_id:5f893a9ca98e97188c93fea8
vaccine:5f70259796f7ed21e85be523
2:Object
dose:Array
_id:5f893acda98e97188c93fea9
vaccine:5f7023ad96f7ed21e85be521
This is my mongoose schema
const mySchema = new Schema({
firstname: {
type: String,
required: true,
},
lastname: {
type: String,
required: true,
},
sex: {
type: String,
required: true,
},
age: {
type: String,
required: true,
},
birthDay: {
type: Date,
required: true,
},
vaccines: [
{
type: new Schema(
{
vaccine: {
type: Schema.ObjectId,
ref: "Vaccine",
},
dose: Array,
},
{ timestamps: true }
),
},
],
});
every time I add a new person the vaccines array gets one new object with the timestamp as you can see, in my js file I use this code:
const addPerson = (person) => {
const myPerson= new Model(person);
return myPerson.save();
};
Then when I add a new vaccine for the same person this does not get the timestamp, I'm using this code for that:
const addPersonVaccine = async ({ params, body }) => {
if (!params) return Promise.reject("Invalid ID");
const vaccines = [body];
const foundPerson = await Model.updateOne(
{
_id: params,
},
{
$push: {
vaccines: vaccines,
},
}
);
return foundPerson;
};
This is what my body inside vaccines array has:
[ { vaccine: '5f72c909594ee82d107bf870', dose: 'Primera' } ]
The problem is that I have no results about the next timestamps, as you can see in my mongo atlas document:
1:Object
dose:Array
_id:5f893a9ca98e97188c93fea8
vaccine:5f70259796f7ed21e85be523
2:Object
dose:Array
_id:5f893acda98e97188c93fea9
vaccine:5f7023ad96f7ed21e85be521
Is that the best way to implement timestamps in subdocuments or sub schemas?
I will appreciate your answers, thnks 👏

Answer 1

You can use mongoose schema timestamps options to the inner schemas
const mongoose = require("mongoose");
const forumSchema = new mongoose.Schema(
{
title: { type: String, required: true },
biddings: [
{
type: new mongoose.Schema(
{
biddingId: String,
biddingPoints: Number
},
{ timestamps: true }
)
}
]
},
{ timestamps: true }
);
const Forum = mongoose.model("Forum", forumSchema);
module.exports = Forum;
for more Mongoose schema set timestamp on nested document