mobx-class-transformer-validator

A simple plugin for class-transformer and class-validator which combines them in a nice and programmer-friendly API.

Installation

Module installation

npm install mobx-class-transformer-validator --save

(or the short way):

npm i -S mobx-class-transformer-validator

Peer dependencies

This package is only a simple plugin/wrapper, so you have to install the required modules too because it can't work without them. See detailed installation instruction for the modules installation:

• class-transformer
• class-validator

Usage

The usage of this module is very simple.

import { IsEmail } from 'class-validator';
import { transformAndValidate } from 'mobx-class-transformer-validator';
 
class UserDto {
  @IsString()
  fullname: string;
}
 
class UserModel {
  @observable firstName: string;
  @observable lastName: string;
  @computed get fullname() {
    return `${this.firstName} ${this.lastName}`;
  }
}
 
const user = new UserModel();
 
// transform the JSON to class instance and validate it correctness
transformAndValidate(UserDto, UserModel)
  .then((userDto: UserDto) => {
    // now you can access all your class prototype method
    console.log(`Hello ${userDto.fullname}`); // prints "Hello World!" on console
  })
  .catch((err) => {
    // here you can handle error on transformation (invalid JSON)
    // or validation error (e.g. invalid email property)
    console.error(err);
  });