Можно ли в express вынести обработку express-validator в DTO?

Question

[Speakermen]

Как можно вынести в Dto? Без TS плохо, но я не знаю как настроить в express в NestJs он шёл из коробки)

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router.post(
  '/register',
  body('firstName').not().isEmpty().trim().escape(),
  body('lastName').not().isEmpty().trim().escape(),
  body('username').not().isEmpty().trim().escape(),
  body('email').isEmail(),
  body('password'),
  body('passwordConf').custom((value, { req }) => {
    if (value !== req.body.password) {
      throw new Error('Password confirmation does not match password');
    }

    // Indicates the success of this synchronous custom validator
    return true;
  }),
  (req, res, next) => {
    authService.register();
    console.log(validationResult(req));

    res.render('register', { title: 'Twitter' });
  }
);

Чтобы получилось типа этого

import { createParamDecorator, ExecutionContext } from '@nestjs/common';

export const ReqBody = createParamDecorator(
  (data: unknown, ctx: ExecutionContext) => {
    const request = ctx.switchToHttp().getRequest();
    return request.body;
  },
);

@UseGuards(LocalAuthGuard)
  @Post('/register')
  async register(
    @ReqBody(new ValidationPipe({ validateCustomDecorators: true }))
    createRegisterDto: CreateRegisterDto,
  ) {
    return this.authService.register(createRegisterDto);
  }

import { IsEmail, IsNotEmpty, MaxLength, MinLength } from 'class-validator';

export class CreateRegisterDto {
  @IsNotEmpty()
  @IsEmail()
  email: string;

  @IsNotEmpty()
  @MinLength(1)
  @MaxLength(255)
  firstName: string;

  @IsNotEmpty()
  @MinLength(1)
  @MaxLength(255)
  lastName: string;

  @IsNotEmpty()
  @MinLength(6)
  @MaxLength(255)
  password: string;
}

Comments

[Speakermen]

router.post('/register', registerShema, (req, res, next) => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) {
    return res.status(400).json({ errors: errors.array() });
  }

  return authService.register();
});

const { body } = require('express-validator');

const shema = [
  body('firstName')
    .not()
    .isEmpty()
    .trim()
    .escape()
    .withMessage('empty')
    .isLength({ min: 2, max: 255 })
    .withMessage('must be at least 2 or 255 chars long'),
  body('lastName')
    .not()
    .isEmpty()
    .trim()
    .escape()
    .withMessage('empty')
    .isLength({ min: 2, max: 255 })
    .withMessage('must be at least 2 or 255 chars long'),
  body('username')
    .not()
    .isEmpty()
    .trim()
    .escape()
    .withMessage('empty')
    .isLength({ min: 2, max: 255 })
    .withMessage('must be at least 2 or 255 chars long'),
  body('email').isEmail().normalizeEmail().withMessage('E-mail already in use'),
  body('password')
    .not()
    .isEmpty()
    .withMessage('empty')
    .isLength({ min: 6, max: 255 })
    .withMessage('must be at least 2 or 255 chars long'),
  body('passwordConf')
    .not()
    .isEmpty()
    .withMessage('empty')
    .custom((value, { req }) => {
      if (value !== req.body.password) {
        throw new Error('Password confirmation does not match password');
      }
      return true;
    }),
];

module.exports = shema;