generator-nest-js-boilerplate/generators/casl/templates/mongodb/jwt/src/exceptions/validation.exceptions.ts

This generator will help you to build your own Nest.js Mongodb API using TypeScript 4

import { BadRequestException, ValidationError } from '@nestjs/common';

function transform(errors: ValidationError[]) {
  return errors.map((error) => (error.constraints ? Object.values(error.constraints) : []));
}

export default class ValidationExceptions extends BadRequestException {
  constructor(public validationErrors: ValidationError[]) {
    super({ error: 'ValidationError', messages: transform(validationErrors).flat() });
  }
}