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mongodb

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mongodb

The official MongoDB driver for Node.js

  • 3.7.4
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
6.6M
decreased by-11.39%
Maintainers
8
Weekly downloads
 
Created

What is mongodb?

The mongodb npm package is the official Node.js driver for MongoDB. It provides a high-level API to connect to and interact with MongoDB databases. With this package, developers can perform CRUD operations, manage database connections, and work with MongoDB features like transactions, indexes, and aggregation.

What are mongodb's main functionalities?

Connecting to a MongoDB database

This code sample demonstrates how to connect to a MongoDB database using the MongoClient object provided by the mongodb package.

const { MongoClient } = require('mongodb');
const url = 'mongodb://localhost:27017';
const client = new MongoClient(url);
async function connect() {
  try {
    await client.connect();
    console.log('Connected to MongoDB');
  } catch (e) {
    console.error(e);
  }
}
connect();

CRUD Operations

This code sample shows how to perform CRUD (Create, Read, Update, Delete) operations on a MongoDB collection using the mongodb package.

const { MongoClient } = require('mongodb');
const url = 'mongodb://localhost:27017';
const client = new MongoClient(url);
const dbName = 'myDatabase';
async function crudOperations() {
  try {
    await client.connect();
    const db = client.db(dbName);
    const collection = db.collection('documents');

    // Create a document
    await collection.insertOne({ a: 1 });

    // Read documents
    const docs = await collection.find({}).toArray();

    // Update a document
    await collection.updateOne({ a: 1 }, { $set: { b: 1 } });

    // Delete a document
    await collection.deleteOne({ b: 1 });
  } catch (e) {
    console.error(e);
  } finally {
    await client.close();
  }
}
crudOperations();

Index Management

This code sample illustrates how to manage indexes in a MongoDB collection, including creating an index and listing all indexes.

const { MongoClient } = require('mongodb');
const url = 'mongodb://localhost:27017';
const client = new MongoClient(url);
const dbName = 'myDatabase';
async function manageIndexes() {
  try {
    await client.connect();
    const db = client.db(dbName);
    const collection = db.collection('documents');

    // Create an index
    await collection.createIndex({ a: 1 });

    // List indexes
    const indexes = await collection.indexes();
    console.log(indexes);
  } catch (e) {
    console.error(e);
  } finally {
    await client.close();
  }
}
manageIndexes();

Aggregation

This code sample demonstrates how to use the aggregation framework provided by MongoDB to process data and compute aggregated results.

const { MongoClient } = require('mongodb');
const url = 'mongodb://localhost:27017';
const client = new MongoClient(url);
const dbName = 'myDatabase';
async function aggregateData() {
  try {
    await client.connect();
    const db = client.db(dbName);
    const collection = db.collection('documents');

    // Perform an aggregation query
    const aggregation = await collection.aggregate([
      { $match: { a: 1 } },
      { $group: { _id: '$b', total: { $sum: 1 } } }
    ]).toArray();
    console.log(aggregation);
  } catch (e) {
    console.error(e);
  } finally {
    await client.close();
  }
}
aggregateData();

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Package last updated on 21 Jun 2023

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