Article Medium - Enhanced validation in Nest.js - STEP-3

app.controller.ts

import { Body, Controller, Post } from '@nestjs/common';
import { AppService } from './app.service';
import { CreateCustomerDto } from './dto/create-customer.dto';

@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}

  @Post('/customer')
  registerCustomer(@Body() body: CreateCustomerDto) {
    return body;
  }
}

create-customer.dto.ts

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

export class CreateCustomerDto {
  @IsNotEmpty()
  name: string;

  @IsNotEmpty()
  @IsEmail()
  email: string;

  @IsNotEmpty()
  @IsNotEmpty()
  password: string;
}

main.ts

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '@nestjs/common';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalPipes(new ValidationPipe());
  await app.listen(3000);
}
bootstrap();