Mongoose: Schemas & Models in Node.js

🍁 MongoDBLesson 11Intermediate

Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js. It provides validation, schema structural constraints, and model lifecycles.

1 Schema Definitions

JavaScript — user.model.js

const mongoose = require("mongoose");

const userSchema = new mongoose.Schema({
  username: { type: String, required: true, unique: true },
  email: { type: String, required: true },
  age: { type: Number, default: 18 }
}, { timestamps: true });

module.exports = mongoose.model("User", userSchema);

2 Code Challenge

Challenge: Define a Mongoose schema for a product containing name (required string), price (number), stock (number, default 0), and categories (array of strings).