Gain insights into building scalable backend applications with NestJS. Explore modules, REST API, TypeORM, JWT authentication, and automated testing to advance your backend development skills.

hello-world.tar.gz

nest-first-app

nest-starter

nest-starter-build

nest-starter-start-in-prod

nest-starter-start-module-controller-service

nest-starter-start-generate-resource

database-agnostic

nest-global-module

nest-scope

books-api

books-api-database

books-api-database-configuration

books-api-database-configuration-joi

books-api-database-configuration-default-env

books-api-database-configuration-dev-env

nest-react-hashing

books-api-test-auth-service

books-api-test-end-to-end

nest-react-spa

nest-react-bcrypt

In this course, you will cover NestJS, a framework used to build efficient and reliable server-side applications. Using this framework, developers can make highly scalable backend applications that can be consumed with any type of frontend. 

You will start the course by learning the foundational blocks of NestJS, such as understanding modules, services, and controllers. Next, you will learn how to build REST API, validation and error handling. You will also learn database integration using TypeORM, app configuration using environment variables, authentication, and authorization using JWT tokens. You will complete this course by learning automated testing and application logging.

After completing this course, you will be equipped with all the necessary skills to build scalable backend applications using NestJS, and that will also advance your career in backend development.

Building a Back-End Application with NestJS

Which package needs to be installed to utilize environment variables in a NestJS application?

Which package needs to be installed to utilize environment variables in a NestJS application?

Which property is used to specify a custom environment file path in the `ConfigModule.forRoot()` method?

Which property is used to specify a custom environment file path in the <code>ConfigModule.forRoot()</code> method?

It ensures that they are deleted after use.

It ensures that they are correctly provided before the application is initialized.

It ensures that they are converted to strings.

It ensures that they are accessible from any module.

What does Joi validation ensure regarding environment variables in the application?

What does Joi validation ensure regarding environment variables in the application?

```typescript
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class BooksService {
  constructor(private configService: ConfigService) {}

  getBooks() {
    const variableValue = this.configService.env('VARIABLE_NAME');
    console.log('Value of VARIABLE_NAME:', variableValue);
  }
}
```

```typescript
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class BooksService {
  constructor(private configService: ConfigService) {}

  getBooks() {
    const variableValue = this.configService.get('VARIABLE_NAME');
    console.log('Value of VARIABLE_NAME:', variableValue);
  }
}
```

```typescript
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class BooksService {
  constructor(private configService: ConfigService) {}

  getBooks() {
    const variableValue = this.configService.variable('VARIABLE_NAME');
    console.log('Value of VARIABLE_NAME:', variableValue);
  }
}
```

```typescript
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class BooksService {
  constructor(private configService: ConfigService) {}

  getBooks() {
    const variableValue = this.configService.access('VARIABLE_NAME');
    console.log('Value of VARIABLE_NAME:', variableValue);
  }
}
```

Which method correctly retrieves the value of an environment variable named `VARIABLE_NAME` in a NestJS service?

Which method correctly retrieves the value of an environment variable named <code>VARIABLE_NAME</code> in a NestJS service?

Test your understanding of NestJS environment variables.

Introduction

Getting Started

NestJS CLI

Building a REST API

Validation and Error Handling

Working with Databases

App Configuration

Authentication

Authorization

Testing

Logging

Wrapping Up

Quiz on App Configuration