MongoDB with Mongoose
Learn to work with MongoDB using Mongoose ODM for Node.js applications. This is a foundational concept in server-side JavaScript development that professional developers rely on daily. The explanations below are written to be beginner-friendly while covering the depth and nuance that comes from real-world Node.js experience. Take your time with each section and practice the examples
60 min•By Priygop Team•Last updated: Feb 2026
Introduction to MongoDB
MongoDB is a NoSQL document database that stores data in flexible, JSON-like documents. Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js that provides a straightforward schema-based solution for modeling application data.
Setting Up MongoDB with Mongoose
Example
// Install dependencies
npm install mongoose
// Connect to MongoDB
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/myapp', {
useNewUrlParser: true,
useUnifiedTopology: true
});
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
db.once('open', () => {
console.log('Connected to MongoDB');
});
// Define a Schema
const userSchema = new mongoose.Schema({
name: {
type: String,
required: true,
trim: true
},
email: {
type: String,
required: true,
unique: true,
lowercase: true
},
age: {
type: Number,
min: 0,
max: 120
},
createdAt: {
type: Date,
default: Date.now
}
});
// Create a Model
const User = mongoose.model('User', userSchema);
// Using the Model
const newUser = new User({
name: 'John Doe',
email: 'john@example.com',
age: 30
});
newUser.save()
.then(user => console.log('User saved:', user))
.catch(err => console.error('Error saving user:', err));