class-validator
Nest
class-validator | Nest | |
---|---|---|
29 | 312 | |
10,501 | 64,419 | |
0.9% | 1.3% | |
9.2 | 9.9 | |
10 days ago | 4 days ago | |
TypeScript | TypeScript | |
MIT License | MIT License |
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class-validator
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Popular Libraries For Building Type-safe Web Application APIs
You can learn more from the documentation here.
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[DDD] Tactical Design Patterns Part 3: Presentation/Infrastructure Layer
This is the request body when creating a new task. The IsString decorator provided by class-validator rejects all types other than strings, including undefined or null. The task name value object does not consider the possibility of values other than strings.
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DRY Principle in Your AWS SAM Application with Middlewares
In this class, we are using the famous class-validator to decorate our request parameters. This way it is more clear how we are going to use our request object and everything.
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Show HN: Graphweaver ā Instant GraphQL API on Postgres, MySQL, SQLite and More
We add validation using https://github.com/typestack/class-validator.
I will make sure we get this documented.
- [Nestia] Boost up your NestJS server much faster and easier (maximum 20,000x faster)
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How can I declare, integrate a JSON (or similar type that is supposed to be data sent from a server) file into my Angular app, and use it;s data to display the array of Devices within it?
Also OP can check out class-transformer + class-validator if he want to properly instantiate objects and validate them with precise and verbose output of potential format errors. OP can even go the god tier way by setting up a custom RxJS operator that does that for him easily.
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NestJS GraphQL image upload into a S3 bucket
Start by installing the class-transformer and class-validator packages for dto validation (see more in the docs), sharp for image optimization, and the S3 client packages.
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NestJS vs. Ditsmod: auto-validation
The description of the request body model in NestJS is similar to the description of Ditsmod models, but NestJS uses decorators provided by the utility class-validator. In NestJS, it is customary to name the request body model with the ending *Dto (this is an abbreviation of Data transfer object):
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Is there any reason not to use typescript?
You could use Zod or Superstruct to validate the types of values, or use typestack/class-validator if it makes sense.
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I found 10,000x faster TypeScript validator library
Also, title of before article was I made 1,000x faster TypeScript validator library, but today's benchmark is showing that typescript-json is maximum 6,500x times faster. It's just because I added a new library class-validator in the benchmark and it is much slower than previous zod. Of course, I've continuously tuned the performance, but it just improved the performance about 2x times only.
Nest
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NestJS tip: how to change HTTP server timeouts
When using the NestJS framework, sometimes you may need to change some default timeout. You can define them just like you'd do in a plain Node.js HTTP server like so:
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Containerize your multi-services app with docker compose
Back: a graphQL server built with Nestjs
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Full Stack Web Development Concept map
NestJS - opinionated more scalable, but harder to learn docs
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Don't go all-in Clean Architecture: An alternative for NestJS applications
Pragmatically, we can apply this to a Nest application by creating an Interface for our services, separating the Presenter layer (Controller) from the Use Case (Services):
- Utilizando Testcontainers para Testes de IntegraĆ§Ć£o com NestJS e Prisma ORM
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A Gentle Introduction to Containerization and Docker
Itās a text document that contains all the commands a user could call to assemble an image. Letās check an example of a Dockerfile for a nodejs app in this case it will be a NestJS app and then explain each part.
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Scalable REST APIs with NestJS: A Testing-Driven Approach
describe('Create bookmarks', () => { const dto: CreateBookmarkDto = { title: 'NestJS', link: 'https://nestjs.com/', }; it('should create bookmark', () => { return pactum .spec() .post('/bookmarks') .withHeaders({ Authorization: 'Bearer $S{userAt}', }) .withBody(dto) .expectStatus(201) .stores('bookmarkId', 'id')//store the bookmark id in the variable bookmarkId .expectBodyContains(dto.title) .expectBodyContains(dto.link) }); });
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Rust GraphQL APIs for NodeJS Developers: Introduction
In my usual NodeJS tech stack, which includes GraphQL, NestJS, SQL (predominantly PostgreSQL with MikroORM), I encountered these limitations. To overcome them, I've developed a new stack utilizing Rust, which still offers some ease of development:
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A Step-by-Step Guide to Implement JWT Authentication in NestJS usingĀ Passport
The purpose of this article is to provide a step-by-step guide for implementing authentication system in a NestJS project using the Passport middleware module.
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From Frontend to Backend
That's exactly where I am. My manager gave me these links, that cover a lot of those words the backend uses, so I can identify what they mean and how to use them. 1. For inspiration and concepts: https://github.com/Sairyss/domain-driven-hexagon 2. Suggested to read the documentation for nest.js. They apply such concepts I don't understand: https://nestjs.com/
What are some alternatives?
zod - TypeScript-first schema validation with static type inference
SailsJS - Realtime MVC Framework for Node.js
joi - The most powerful data validation library for JS [Moved to: https://github.com/hapijs/joi]
Koa - Expressive middleware for node.js using ES2017 async functions
class-transformer - Decorator-based transformation, serialization, and deserialization between objects and classes.
loopback-next - LoopBack makes it easy to build modern API applications that require complex integrations.
TypeORM - ORM for TypeScript and JavaScript. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, SAP Hana, WebSQL databases. Works in NodeJS, Browser, Ionic, Cordova and Electron platforms.
feathers - The API and real-time application framework
ajv - The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)
Ts.ED - :triangular_ruler: Ts.ED is a Node.js and TypeScript framework on top of Express to write your application with TypeScript (or ES6). It provides a lot of decorators and guideline to make your code more readable and less error-prone. āļø Star to support our work!
io-ts - Runtime type system for IO decoding/encoding
Moleculer - :rocket: Progressive microservices framework for Node.js