how set up expire time while saving data mongodb - node.js

Question

there is a way to set ttl (expire time?) while saving the data in the db ?
i have this schema :
const mongoose = require("mongoose");
const { ObjectId } = mongoose.Schema;
const productSchema = new mongoose.Schema(
{
name: {
type: String,
trim: true,
required: true,
maxlength: 255,
},
description: {
type: String,
trim: true,
required: true,
maxlength: 2000,
},
discountprice: {
type: Number,
maxlength: 32,
trim: true,
},
price: {
type: Number,
required: true,
maxlength: 32,
trim: true,
},
photo: String,
},
{ timestamps: true }
);
module.exports = mongoose.model("Product", productSchema);
i would like to set up a expire date for each product while saving ...
how do i save the product :
var product = {
name: item.title,
description: item.description,
photo: item.image,
discountprice: item.deal_price.value,
price: item.list_price.value,
};
let prodotto = new Product(product);
prodotto.save((err, prodotto) => {
if (err) {
console.log(err);
}
});
how can i set up exipire time here ?

Answer 1

If you do not want to add the expiration date to your model then simply pass the expiration as a variable in your product object.
var product = {
name: item.title,
description: item.description,
photo: item.image,
discountprice: item.deal_price.value,
price: item.list_price.value,
expiration: <some_value/variable>
};