Create an Express route to handle deletion of documents from a MongoDB collection.

Question

Aryan Kumar · Answer

Sure, here is an Express route to handle deletion of documents from a MongoDB collection:

JavaScript

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017/mydb';

const app = express();

app.get('/delete', async (req, res) => {
  const client = await MongoClient.connect(url);
  const db = client.db('mydb');

  const collection = db.collection('people');
  const id = req.query.id;

  const result = await collection.deleteOne({ _id: id });

  if (result.deletedCount === 1) {
    res.status(200).send('Document deleted successfully');
  } else {
    res.status(404).send('Document not found');
  }
});

app.listen(3000, () => console.log('Server started on port 3000'));

This route first imports the express and mongodb modules. It then defines the MongoDB connection URL, which is mongodb://localhost:27017/mydb.

Next, the route defines a get handler for the /delete route. The handler takes a req and res object as its input. The req object contains the query parameters from the request, and the res object is used to send the response back to the client.

The get handler first connects to the MongoDB database and gets the people collection. The handler then gets the id of the document to be deleted from the req object.

The handler then uses the deleteOne() method to delete the document from the collection. The deleteOne() method returns a result object, which contains the number of documents that were deleted.

If the document was deleted successfully, the handler sends a 200 OK response back to the client. Otherwise, the handler sends a 404 Not Found response back to the client.

To run this route, you can save it as a file called delete.js and then run it from the command line:

node delete.js

This will start the Express server on port 3000. You can then test the route by making a GET request to http://localhost:3000/delete?id=1. If the document with the ID 1 exists in the people collection, it will be deleted. Otherwise, a 404 Not Found response will be returned.

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Create an Express route to handle deletion of documents from a MongoDB collection.

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