NestJS：查询参数作为字符串数组传入

Question

我一直在为 NestJS 查询参数苦苦挣扎。浏览器正在向此路径发送请求：

/v0/api/patients/674/insurancecard?isFront=true&size=small

但是在服务器上，req 对象上的查询数据如下所示：

{ isFront: [ 'true', 'true' ], size: [ 'small', 'small' ] }

这是在转换之前^^

预计 req.query 看起来像这样：

{ isFront: 'true', size: 'small' }

控制器：

export interface CustomRequest extends Request {
 credentials: AuthCredentials;
}
export class InsuranceCardDto {
  @IsString()
  size: 'small' | 'original';

  @IsBoolean()
  isFront: boolean;
}

@Controller('patients')
export class PatientsController {
  constructor(private readonly pateintsService: PatientsService) {}

  @Get(':id/insurancecard')
  @UserTypes('employee', 'admin', 'patient')
  @UseGuards(IsAuthenticatedGuard, UsersGuard)
  @UsePipes(new ValidationPipe({ transform: true, transformOptions: { enableImplicitConversion: true } }))
  async insuranceCard(
    @Param('id', ParseIntPipe) id: number,
    @Query() payload: InsuranceCardDto,
    @Req() { credentials: { userType, user } }: CustomRequest,
    @Res() res: Response,
  ) {...}
}

当前服务器配置：

import { HttpException, INestApplication } from '@nestjs/common';
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { urlencoded, json } from 'express';
import tlsconfig from './config/tlsconfig';
import { allowedOrigins } from './config';
import { AllExceptionFilter } from './middleware/exceptions.filter';
// import newLogger from './helpers/logger';

export async function bootstrap(): Promise<INestApplication> {
  const app = await NestFactory.create(AppModule, { httpsOptions: tlsconfig, logger: ['error'] }); // IF you want to see all logs provide logger to nest. BetterPT Logger works too. Helps for debugging

  app.setGlobalPrefix('api');
  app.use(json({ limit: '20mb' }));
  app.use(urlencoded({ limit: '20mb', extended: true }));
  app.useGlobalFilters(new AllExceptionFilter());
  // app.useGlobalPipes(new ValidationPipe({ transform: true, transformOptions: { enableImplicitConversion: true } }));

  app.enableCors({
    origin: (origin, callback) => {
      if (origin && !allowedOrigins.includes(origin)) return callback(new HttpException('CORS error', 501), origin);
      return callback(null, origin);
    },
  });
  await app.listen(process.env.PORT || 5511);
  return app;
}