joi-decorator

Decorator based interface for Joi.

Installation

npm install joi-decorator reflect-metadata

The basics

First you need to declare an entity:

import { mustBe, a } from "joi-decorator";

export class User {
    @mustBe(a.string().alphanum().min(3).max(30).required())
    username: string
    @mustBe(a.string().regex(/^[a-zA-Z0-9]{3,30}$/))
    password: string
    @mustBe([a.string(), a.number()])
    accessToken: string | number
    @mustBe(a.number().integer().min(1900).max(2013))
    birthyear: number
    @mustBe(a.string().email())
    email: string
    constructor(
        username: string,
        password: string,
        access_token: string | number,
        birthyear: number,
        email: string
    ) {
        this.username = username
        this.password = password
        this.accessToken = accessToken
        this.birthyear = birthyear
        this.email = email
    }
}

Then you can validate the entity instances:

Example 1: Valid entity

import { validate } from "joi-decorator";
import {  User } from "./entities/user";

const userInput = new User(
    "root",
    "secret",
    "token",
    1989,
    "[email protected]"
);

const userValid = validate(userInput);

License

Inspired by zafiro-validators.

MIT License

Copyright (c) Jean-Baptiste Pionnier