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ObjectID

Why use ObjectID​

  • ObjectId is a fundamental component that ensures each document within a collection has a unique identifier
  • By embedding metadata like the creation timestamp and maintaining efficiency in generating unique IDs
  • ObjectId plays a crucial role in the effective management and retrieval of documents in MongoDB
// _id:67637e50a77f3386fec416ca
// 12 bytes
//  4 bytes: timestamp
//  3 bytes: machine identifier
//  2 bytes: process identifier
//  3 bytes: counter

Generate a New ObjectId​

const mongoose = require('mongoose');
const id = new mongoose.Types.ObjectId();
console.log(id);

Get Timestamp​

const mongoose = require('mongoose');
const id = new mongoose.Types.ObjectId();
const timestamp = id.getTimestamp();

Validate ObjectID​

const mongoose = require('mongoose');
const id = new mongoose.Types.ObjectId();

const isValid = mongoose.Types.ObjectId.isValid(id);
console.log(isValid);

//to use validation in code
if(!mongoose.Types.ObjectId.isValid(req.body.customerID)){ 
  return res.status(400).send('Invalid Customer');
}