DB_Address

Discover how to build secure RESTful APIs using NestJS, TypeScript, and various technologies. Delve into authentication, data modeling, error handling, testing, and deployment for scalable, real-world applications.

Yan Sun - Building Real-World Restful APIs with NestJS and TypeScript-02.png

address-book-api.tar.gz

region

access_key_id

secret_access_key

output

nestjs-new

nestjs-2.1-module

nestjs-2-install-start

nestjs-typeorm-2

nestjs-base

nestjs-playground

nestjs-install-hmr-start

nestjs-orm-migration

nestjs-typeorm-2-e2e

nestjs-typeorm-docker

nestjs-2.1-test-auto

nestjs-2.1-module-AWSCLI

Testing Example

NestJS is built on top of the popular Express.js library and provides a modular and structured approach to building server-side applications.

You will take a hands-on approach to constructing a practical RESTful API from the ground up. By leveraging NestJS, TypeScript, and other technologies, you will delve into various topics, such as data modeling with TypeORM and MySQL, authentication and authorization mechanisms, request validation, error handling strategies, testing methodologies, deployment practices, and more.

By the end of this course, you will have gained the essential skills, knowledge, and hands-on experience necessary to build a real-world RESTful API. You will have learned how to scale your application using a public cloud, such as AWS, where your application can serve thousands and millions of customers cost-effectively. This comprehensive learning journey equips you to confidently navigate the intricacies of RESTful API development, ensuring you are well-prepared for NestJS development.

Building Secure RESTful APIs with NestJS: A Practical Guide

The class-validator and validation pipes are unrelated features in NestJS, serving different purposes in isolation.

The class-validator is a library used for defining database schemas in TypeORM, while the validation pipes are used for input validation in NestJS.

The class-validator defines validation rules for entities and DTOs in NestJS, ensuring data integrity and validity. At the same time, validation pipes provide a global mechanism for validating input data at various stages of request processing.

The class-validator is only used for creating custom pipes in NestJS, while the validation pipes are used for persisting data into the database.



Which statement best describes the validation pipe and class-validator in NestJS?

Which statement best describes the validation pipe and class-validator in NestJS?

The app will only allow explicitly defined properties in the validation schema. It will not reject requests that include extra properties not in the schema. The `ValidationPipe` pipe will also strip nondecorator properties from the request, and detailed error messages will be enabled.

The app will only accept explicitly defined properties in the validation schema. It won't reject requests with properties not in the schema. The `ValidationPipe` pipe will also strip nondecorator properties from the request, and detailed error messages won't be enabled.

The app will only allow explicitly defined properties in the validation schema. It will reject requests with properties not in the schema. The `ValidationPipe` pipe won't strip nondecorator properties from the request, and detailed error messages won't be enabled.

The app will only allow explicitly defined properties in the validation schema. It will reject requests with properties not in the schema. The `ValidationPipe` pipe will also strip nondecorator properties from the request, and detailed error messages will be enabled.

In the given code snippet for configuring the `ValidationPipe` options in a NestJS app, what is the behavior of the validation process when handling the incoming requests? 
```
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true,
      forbidNonWhitelisted: false,
      forbidUnknownValues: true,
      disableErrorMessages: true
    }),
  );

```
Choose the most accurate description.

In the given code snippet for configuring the <code>ValidationPipe</code> options in a NestJS app, what is the behavior of the validation process when handling the incoming requests?
<pre><code> app.useGlobalPipes(
 new ValidationPipe({
 whitelist: true,
 forbidNonWhitelisted: false,
 forbidUnknownValues: true,
 disableErrorMessages: true
 }),
 );

</code></pre>
Choose the most accurate description.

To catch and handle errors that occur during the application's startup process

To log detailed information about every HTTP request made to the application

To intercept and process exceptions thrown during the execution of route handlers or middleware

To enforce authentication and authorization rules for specific routes and endpoints


What is the primary purpose of an exception filter in NestJS?

What is the primary purpose of an exception filter in NestJS?

Built-in exceptions are only used for handling HTTP-related errors, while custom exceptions are used for handling application-specific errors.

Built-in exceptions are created using the `HttpException` class, while custom exceptions are created using the `CustomException` class.


Built-in exceptions provide standardized error responses, while custom exceptions can be defined to provide specific error details with custom logic.

Built-in exceptions are used to handle errors that arise from external services, while custom exceptions are used to handle errors related to data validation and application logic.

In a NestJS app, what is the main difference between a built-in and custom exception?

In a NestJS app, what is the main difference between a built-in and custom exception?

Implement a custom exception filter for the specific route that logs the incoming requests.

Create a dedicated service to handle request logging and inject it into the route controller.

To enable request logging, develop a custom decorator and apply it to the route handler function.



Implement a middleware and apply it specifically to the route for logging the incoming requests.

Which option would you use to log all incoming requests for a particular route in a NestJS app?

Which option would you use to log all incoming requests for a particular route in a NestJS app?

Test your knowledge of NestJS validation, exception handling, and logging concepts.

Introduction

NestJS Fundamentals

Connecting with REST: Building the Address Book App with NestJS

Understand the Basics of NestJS and RESTful APIs

Validation, Exception Handling, and Logging

Persist Data with TypeORM and MySQL

Serialization and Interceptors

Authentication and Authorization

Persist Data, Authentication, Validation, and Serialization

Testing

Deployment

Testing and Deployment

Conclusion

Appendix

Quiz: Validation, Exception Handling, and Logging