design.md

layout	title
default	System Design

Directory structure

Overview

You can customize the src and api directories.

src/
├─ api/
│  ├─ user/
│  │  ├─ controller.js
│  │  ├─ index.js
│  │  ├─ index.test.js
│  │  ├─ model.js
│  │  └─ model.test.js
│  └─ index.js
├─ services/
│  ├─ express/
│  ├─ facebook/
│  ├─ mongoose/
│  ├─ passport/
│  ├─ sendgrid/
│  └─ your-service/
├─ app.js
├─ config.js
└─ index.js

src/api/

Here is where the API endpoints are defined. Each API has its own folder.

src/api/some-endpoint/model.js

It defines the Mongoose schema and model for the API endpoint. Any changes to the data model should be done here.

src/api/some-endpoint/controller.js

This is the API controller file. It defines the main router middlewares which use the API model.

src/api/some-endpoint/index.js

This is the entry file of the API. It defines the routes using, along other middlewares (like session, validation etc.), the middlewares defined in the some-endpoint.controller.js file.

services/

Here you can put helpers, libraries and other types of modules which you want to use in your APIs.

Error handling

Errors are handled by the services/error middleware. You can pass errors within an async call by calling next(error) where error is an Object with a Prototype of error. The APIError constructor function has been provided for creating anticipated operational errors.

Logging

Logging is achieved via Pino. In development mode we can pipe Node's stdout into Pino for pretty printing.