Nestjs 接口验证

class-validator
Nestjs

yarn add class-transformer class-validator

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({
    disableErrorMessages: true, // 不显示错误信息
    whitelist: true, // 开启过滤
  }))
  await app.listen(5000);
}
bootstrap();

controller

import { signInDto } from './dto/signin.dto'

  @Post('signin')
  signIn(@Body() body: signInDto ){
    l(body)
    return this.appService.signIn(body)
  }

signin.dto.ts

import { IsNotEmpty, Length, IsString } from 'class-validator'
export class signInDto {

  @IsNotEmpty()
  @IsString()
  username: string;

  @IsNotEmpty({
    message: '密码不能为空?'
  })
  @Length(6, 12)
  password: string;
}