NestJS Practice

Repository created to record my practice learning NestJS with exercises based on the Udemy Course of Stephen Grider.

Table of contents

• Status
• Requirements
• Setup
• How to run it
• Repo structure & what i learned in each exercise
• Other practice repos

Status

• Current repo's version is
• This course has been completed on 03/04/2026 - Certificate

Setup

After cloning the repo, go to the created folder and install the node packages.

git clone https://github.com/NicolasOmar/nest-practice.git
cd nest-practice
npm run setup-all

setup-all is the command to install all the projects, but if you want to do it one by one, you can change that last line for one of the following:

App Setup	Command
All	npm run setup-all
From Scratch	npm run setup-scratch
Project with CLI	npm run setup-with-cli
Persistance and Authentication	npm run setup-persistance-and-auth

How to run it

To run any specific exercise, execute the following command in the project´s folder:

npm start

Repo structure & what I learned in each exercise

• From Scratch (1-scratch folder)
  • Installing minimal libraries to create a NestJS server.
  • Basic understanding of concepts such as Controller and Module.
  • Understanding of naming conventions for files.
• Project with CLI (2-project-with-cli folder)
  • How to create a new NestJS project using its CLI.
  • Understanding of creation commands such as generate module and generate controller.
  • How to use other decorators such as Body and Param.
  • How to use a DTO (Data Transfer Object).
  • How to implement the Inversion of Control principle using the Injectable decorator.
• Persistence and Authentication (3-persistance-and-auth folder)
  • How to integrate a SQL database using TypeORM and SQLite.
  • How to execute CRUD action on the entity layer with TypeORM.
  • Understand the usage of remove and save methods to help logging in the database layer.
  • How to implement an interceptor to handle data at several levels.
  • How to create and implement a custom decorator.
  • Use node functions like randomBytes, scrypt, and promisify for password hashing.
  • How to handle session data through a session cookie in different ways (including ParamDecorators and Interceptors).
  • How to handle access for any handler through a Guard.
  • How to create and maintain unit tests with Jest.
  • Basic understanding of end to end testing.
  • How to add table relations in TypeORM.
  • How to handle and implement authentication through a middleware layer.
  • How to build complex queries using createQueryBuilder.

Other practice repos

Node	React	Angular	GraphQL	HTML & CSS	Styling	Typescript	NextJS	Python