Nestjs GraphQL Best Practice

NestJS (Express + Typeorm) codebase containing real world examples (CRUD, auth, advanced patterns).

Table of Contents

• Structure
• Function
• Usage
• Starting the Server
• Node.js Best Practices
  • 1. Project Structure Practices
  • 2. Error Handling Practices
  • 3. Code Style Practices
  • 4. Testing And Overall Quality Practices
  • 5. Going To Production Practices
  • 6. Security Best Practices
  • 7. Performance Best Practices

Structure

Function

1. Dynamic import
2. Authenticate
   • Config jwt like OAuth ( access-token, refresh-token )
   • OAuth Google
   • OAuth Facebook
3. Dump database
   • Child process
4. Logger
   • NestJs
   • Wiston
5. Send mail
   • Nodemailer
6. Payment
   • Stripe
7. Task scheduler
   • Timeout
   • Interval
   • Cron
8. Translate
   • Google translate
9. Upload file
   • Cloudinary
   • Fs createWriteStream to folder static
10. Test
    • Unit
    • E2e
    • Coverage

Usage

1. Clone repository

  git clone https://github.com/chnirt/nestjs-graphql-best-practice.git

2. Cd into directory

  cd nestjs-graphql-best-practice/

3. Create .env

  touch .env

4. Add to .env

  PORT=<yourport>

5. Install dependencies using npm

  npm i

Starting the Server

1. Generate graphql.schema.ts

  npm run gen

2.1 Start in development normal

  npm run start:dev

2.2 Start with webpack ( 2 terminal view )

  npm run webpack
  npm run start:hmr

Node.js Best Practices

1. Project Structure Practices

[✔️] 1.1 Structure your solution by components

[✔️] 1.2 Layer your components, keep Express within its boundaries

[✔️] 1.3 Wrap common utilities as npm packages

[❌] No neccessary - 1.4 Separate Express 'app' and 'server'

[✔️] 1.5 Use environment aware, secure and hierarchical config

2. Error Handling Practices

[✔️] 2.1 Use Async-Await or promises for async error handling

[✔️] 2.2 Use only the built-in Error object

![❔] 2.3 Distinguish operational vs programmer errors

[✔️] 2.4 Handle errors centrally, not within an Express middleware

[✔️] 2.5 Document API errors using Swagger or GraphQL

[✔️] 2.6 Exit the process gracefully when a stranger comes to town

[✔️] 2.7 Use a mature logger to increase error visibility

[✔️️] use Jest - 2.8 Test error flows using your favorite test framework

![❔] 2.9 Discover errors and downtime using APM products

[✔️] 2.10 Catch unhandled promise rejections

[✔️] 2.11 Fail fast, validate arguments using a dedicated library

3. Code Style Practices

[❌] No neccessary - 3.1 Use ESLint

[❔] 3.2 Node.js specific plugins

[✔️] 3.3 Start a Codeblock's Curly Braces on the Same Line

[✔️] 3.4 Separate your statements properly

[✔️] 3.5 Name your functions

[✔️] 3.6 Use naming conventions for variables, constants, functions and classes

[✔️] 3.7 Prefer const over let. Ditch the var

[✔️] 3.8 Require modules first, not inside functions

[✔️] Nest must import files directly - 3.9 Require modules by folders, opposed to the files directly

[✔️] 3.10 Use the === operator

[✔️] 3.11 Use Async Await, avoid callbacks

[✔️] 3.12 Use arrow function expressions (=>)

4. Testing And Overall Quality Practices

[✔️] 4.1 At the very least, write API (component) testing

[✔️] use Jest - 4.2 Include 3 parts in each test name

[✔️] use Jest - 4.3 Structure tests by the AAA pattern

[✔️] 4.4 Detect code issues with a linter

[〽️] use Jest - 4.5 Avoid global test fixtures and seeds, add data per-test

[✔️] 4.6 Constantly inspect for vulnerable dependencies

![❔] 4.7 Tag your tests

[✔️] 4.8 Check your test coverage, it helps to identify wrong test patterns

[✔️] 4.9 Inspect for outdated packages

[✔️] 4.10 Use production-like env for e2e testing

[✔️] 4.11 Refactor regularly using static analysis tools

[✔️] 4.12 Carefully choose your CI platform (Jenkins vs CircleCI vs Travis vs Rest of the world)

5. Going To Production Practices

![❔] 5.1. Monitoring!

[✔️] 5.2. Increase transparency using smart logging

![❔] 5.3. Delegate anything possible (e.g. gzip, SSL) to a reverse proxy

[✔️] 5.4. Lock dependencies

![❔] 5.5. Guard process uptime using the right tool

[✔️] 5.6. Utilize all CPU cores

[✔️] 5.7. Create a ‘maintenance endpoint’

[✔️] 5.8. Discover errors and downtime using APM products

[✔️] 5.9. Make your code production-ready

![❔] 5.10. Measure and guard the memory usage

[✔️] 5.11. Get your frontend assets out of Node

![❔] 5.12. Be stateless, kill your servers almost every day

[✔️] 5.13. Use tools that automatically detect vulnerabilities

![❔] 5.14. Assign a transaction id to each log statement

[✔️] 5.15. Set NODE_ENV=production

![❔] 5.16. Design automated, atomic and zero-downtime deployments

![❔] 5.17. Use an LTS release of Node.js

![❔] 5.18. Don't route logs within the app

6. Security Best Practices

[✔️] 6.1. Embrace linter security rules

[✔️] 6.2. Limit concurrent requests using a middleware

[✔️] 6.3 Extract secrets from config files or use packages to encrypt them

[✔️] 6.4. Prevent query injection vulnerabilities with ORM/ODM libraries

![❔] 6.5. Collection of generic security best practices

[✔️] 6.6. Adjust the HTTP response headers for enhanced security

[✔️] 6.7. Constantly and automatically inspect for vulnerable dependencies

[✔️] 6.8. Avoid using the Node.js crypto library for handling passwords, use Bcrypt

![❔] 6.9. Escape HTML, JS and CSS output

[✔️] 6.10. Validate incoming JSON schemas

![❔] 6.11. Support blacklisting JWTs

![❔] 6.12. Prevent brute-force attacks against authorization

[✔️] 6.13. Run Node.js as non-root user

[✔️] 6.14. Limit payload size using a reverse-proxy or a middleware

![❔] 6.15. Avoid JavaScript eval statements

![❔] 6.16. Prevent evil RegEx from overloading your single thread execution

[✔️] 6.17. Avoid module loading using a variable

![❔] 6.18. Run unsafe code in a sandbox

![❔] 6.19. Take extra care when working with child processes

[✔️] 6.20. Hide error details from clients

[✔️] 6.21. Configure 2FA for npm or Yarn

[❌] No neccessary - 6.22. Modify session middleware settings

![❔] 6.23. Avoid DOS attacks by explicitly setting when a process should crash

[❌] No neccessary - 6.24. Prevent unsafe redirects

[✔️] 6.25. Avoid publishing secrets to the npm registry

7. Performance Best Practices

Our contributors are working on this section. Would you like to join?

[✔️] 7.1. Prefer native JS methods over user-land utils like Lodash

[❔] 7.2. Use Fastify in place of Express