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Day 05 Integration & Deployment

Atlas and Mongoose

MongoDB Atlas for production, Mongoose for Node.js with schemas, validation, and populate.

~1 hour Hands-on Precision AI Academy

Today’s Objective

MongoDB Atlas for production, Mongoose for Node.js with schemas, validation, and populate.

Atlas and Mongoose is one of the most important topics in MongoDB in 5 Days. This lesson builds the foundation you need before moving to more advanced concepts — take time with each example and run the code yourself.

MongoDB Atlas Setup

Atlas setup
ATLAS SETUP
# 1. Sign up at mongodb.com/atlas (free tier = 512MB)
# 2. Create a cluster (M0 = free)
# 3. Create a database user
# 4. Add your IP to the allowlist
# 5. Get connection string:
# mongodb+srv://user:[email protected]/mydb
Mongoose Schema and Model
MONGOOSE SCHEMA AND MODEL
npm install mongoose

import mongoose from 'mongoose';
await mongoose.connect(process.env.MONGODB_URI);

const postSchema = new mongoose.Schema({ title: { type: String, required: true, trim: true, maxlength: 200 }, body: { type: String, required: true }, author: { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true }, tags: [String], published: { type: Boolean, default: false }, createdAt: { type: Date, default: Date.now },
});

postSchema.index({ title: 'text' });

export const Post = mongoose.model('Post', postSchema);
Mongoose CRUD and populate
MONGOOSE CRUD AND POPULATE
// Create
const post = await Post.create({ title: 'Hello', body: 'World', author: userId
});

// Read with populate (join)
const posts = await Post.find({ published: true }) .populate('author', 'name email')  // only name and email .sort('-createdAt') .limit(20);

// Update
await Post.findByIdAndUpdate(id, { $set: { published: true } }, { new: true });

// Delete
await Post.findByIdAndDelete(id);
📝 Day 5 Exercise
Move to MongoDB Atlas
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Supporting Resources

Go deeper with these references.

MongoDB Docs
Official MongoDB Manual Complete reference documentation for all MongoDB features and operations.
→
MongoDB University
Free MongoDB Courses Official free courses on MongoDB fundamentals, aggregation, and performance.
→
GitHub
MongoDB Driver Examples Official Node.js and Python driver examples on GitHub.
→

Day 5 Checkpoint

Before moving on, make sure you can answer these without looking:

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