Creating a Connection
To open a connection to your MongoDB database using Mongoose, you typically do this at the beginning of your Node.js application. You need to specify the MongoDB URI, which includes information about the database server and authentication details.
const mongoose = require('mongoose');
// MongoDB URI
const dbURI = 'mongodb://localhost/mydatabase';
// Connect to MongoDB
mongoose.connect(dbURI, { useNewUrlParser: true, useUnifiedTopology: true });
// Event handling for successful connection
mongoose.connection.on('connected', () => {
console.log('Mongoose connected to ' + dbURI);
});
// Event handling for connection error
mongoose.connection.on('error', (err) => {
console.error('Mongoose connection error: ' + err);
});
// Event handling when the connection is disconnected
mongoose.connection.on('disconnected', () => {
console.log('Mongoose disconnected');
});
Mongoose Connections
A Mongoose connection is a Node.js module that establishes and manages connections between a Node.js application and a MongoDB database. It optimizes resource utilization, handles connection pooling, and manages errors, facilitating efficient data operations.