How to use insertOne() Method with insertedId Property In NodeJS

In the MongoDB, insertOne() method is used to insert a single document into the collection. It also returns the document that contains inserted document details & inserted Id property.

Syntax:

db.collection.insertOne(document, callback)

• document: The document to be inserted into the collection.
• callback: An optional callback function that is called after the insertion is complete

Example 1: Adding the Java course and getting the Inserted Id

const mongoose = require("mongoose");
const Course = require("./model");
const db = require("./dbConnect");

async function insertData() {
  try {
    
    const javaCourse = new Course({
      Title: "Java",
      Fees: 10000,
      Instructor: "Akhil Sir",
      date: new Date("2024-03-23"),
    });

    
    const savedCourse = await javaCourse.save();

    
    const insertedId = savedCourse._id;
    console.log("Inserted document _id:", insertedId);

    console.log("Data inserted successfully");

    
    const insertedData = await Course.find({});
    console.log("Inserted data:");
    console.log(insertedData);
  } catch (error) {
    console.error("Error inserting data:", error);
  } finally {
    
    mongoose.disconnect();
  }
}


insertData();

Output:

Server is running on port 3000
MongoDB connected
Inserted document _id: new ObjectId('662894fbef2273c58f5d1592')
Data inserted successfully
Inserted data:
[
  {
    _id: new ObjectId('662894fbef2273c58f5d1592'),
    Title: 'Python',
    Fees: 25000,
    Instructor: 'Sushant Sir',
    date: 2024-03-23T00:00:00.000Z,
    __v: 0
  }
]

Example 2: Adding the Python course & getting the Inserted Id

const mongoose = require("mongoose");
const Course = require("./model");
const db = require("./dbConnect");

async function insertData() {
  try {
    const pythonCourse = new Course({
      Title: "Python",
      Fees: 25000,
      Instructor: "Sushant Sir",
      date: new Date("2024-03-23"),
    });

  
    const savedCourse = await pythonCourse.save();

   
    const insertedId = savedCourse._id;
    console.log("Inserted document _id:", insertedId);

    console.log("Data inserted successfully");

    
    const insertedData = await Course.find({});
    console.log("Inserted data:");
    console.log(insertedData);
  } catch (error) {
    console.error("Error inserting data:", error);
  } finally {
   
    mongoose.disconnect();
  }
}

insertData();

Output:

Server is running on port 3000
MongoDB connected
Inserted document _id: new ObjectId('662894c857ef020ca85343f0')
Data inserted successfully
Inserted data:
[
  {
    _id: new ObjectId('662894c857ef020ca85343f0'),
    Title: 'Python',
    Fees: 25000,
    Instructor: 'Sushant Sir',
    date: 2024-03-23T00:00:00.000Z,
    __v: 0
  }
]

MongoDB is a popular type of NoSQL database. It stores data in documents that look like JSON. When working with MongoDB using Mongoose, _id is a unique identifier of each document in a collection and it can be used to perform operations on the document, such as updating or deleting it. The insertion method is used to insert a document into a MongoDB collection.

In this article, We will learn about the process of Getting the _id of the inserted document in Mongo database in NodeJS by understanding the various methods along with the examples and so on.