在nestjs中使用自动转换验证时获得500

import { Module } from '@nestjs/common';
import { ValidationModule } from 'nestjs-validation';

@Module({
  imports: [ValidationModule],
})
export class AppModule {}

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

export class CreateUserDto {
  @IsString()
  @IsNotEmpty()
  username: string;

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

import { Controller, Post, Body } from '@nestjs/common';
import { CreateUserDto } from './dto/create-user.dto';

@Controller('users')
export class UsersController {
  @Post()
  createUser(@Body() createUserDto: CreateUserDto) {
    // 处理创建用户的逻辑
  }
}

import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';

@Catch(HttpException)
export class HttpExceptionFilter implements ExceptionFilter {
  catch(exception: HttpException, host: ArgumentsHost) {
    const ctx = host.switchToHttp();
    const response = ctx.getResponse();
    const status = exception.getStatus();

    response.status(status).json({
      statusCode: status,
      message: 'Validation failed',
    });
  }
}

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { HttpExceptionFilter } from './http-exception.filter';

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