objectid is not defined node js mongodb

To resolve the issue of objectid is not defined in Node.js with MongoDB, you need to ensure that you have imported the necessary modules and libraries. Here are the steps to follow:

Step 1: Install Required Packages

Make sure you have the required packages installed in your project. In this case, you need to install the mongoose package, which is used to connect your Node.js application to the MongoDB database. You can install it using npm by running the following command in your terminal:

npm install mongoose

Step 2: Import the Required Modules

In your Node.js file, you need to import the necessary modules and libraries. Specifically, you need to import the mongoose module to use the ObjectId type. Here's an example of how to import the mongoose module and use the ObjectId type:

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

// Now you can use the ObjectId type
const id = new ObjectId();
console.log(id);

Step 3: Use the ObjectId Type

Once you have imported the mongoose module and the ObjectId type, you can use it to create unique identifiers for your MongoDB documents. The ObjectId type is commonly used as the default type for the _id field in MongoDB collections. Here's an example of how to use the ObjectId type:

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

// Create a new ObjectId
const id = new ObjectId();
console.log(id);

// Use the ObjectId in a MongoDB query
const result = await MyModel.findById(id);
console.log(result);

By following these steps, you should be able to resolve the issue of objectid is not defined in Node.js with MongoDB.