Controllers & Logic

Intro

Move beyond basic handlers and learn to properly organize your business logic using controllers and services. This lesson is your entry into clean architecture with Cortado.js.

What you’ll do

• Create controller files with clearly defined endpoints

• Extract logic into reusable service layers

• Handle validation and data shaping at the controller level

• Add custom error messages and status codes

Why it matters

Good API structure improves maintainability. You’ll walk away knowing how to avoid bloated files and spaghetti logic — and how to keep your project clean as it grows.