Mongoose ODM: Schemas, Models & Validation

« Replica Sets & Horizontal Sharding« Previous Take Certification Exam »

Connect Node.js and TypeScript applications to MongoDB with Mongoose schemas, virtual properties, and hooks.

Modeling with Mongoose

Mongoose provides schema enforcement, automatic type casting, lifecycle hooks (pre("save")), and reference population (populate()).

Mongoose Schema Definition

Try It Yourself »

import mongoose, { Schema } from 'mongoose';

const UserSchema = new Schema({
  email: { type: String, required: true, unique: true, lowercase: true },
  passwordHash: { type: String, required: true },
  role: { type: String, enum: ['user', 'admin'], default: 'user' }
}, { timestamps: true });

export const User = mongoose.model('User', UserSchema);

Google AdSense Slot (inContentBanner)

Set your Publisher ID in src/config/ads.ts to display live ads.

Test Yourself With Exercise

+15 XP

Which popular Node.js library acts as an Object Data Modeling (ODM) layer for MongoDB with schema validation?

« Previous: Replica Sets & Horizontal Sharding Take Certification Exam »