あなたはすぐに解決できる？NestJsのコントローラ実装で2時間詰まった話 #TypeScript – Qiita

@Controller('sample')
export class SampleController {
  constructor(private readonly sampleService: SampleService) {}

  @Get()
  @ApiOperation({ summary: '一覧の取得' })
  @ApiOkEnvelopedResponse({
    type: SampleExEntity,
    isArray: true,
  })
  async findAllList(
    @User() user: AuthedUser,
    @Query() dto: SearchSampleListDto,
    @Query() pageOption: PageOptionDto,
  ) {
    const [samples, count] = await this.samplesService.findAll(
      user,
      dto,
      pageOption,
    );
    return [
      samples.map(mapToSampleListExEntity),
      PageEntity.new(count, pageOption),
    ];
  }

  @Post()
  @ApiOperation({ summary: '新規作成' })
  @ApiOkEnvelopedResponse({
    type: SampleExEntity,
  })
  async create(
    @User() user: AuthedUser,
    @Body() dto: CreateSampleDto,
  ): PromiseSampleExEntity> {
    const sample = await this.samplesService.create(user, dto);
    return mapToSampleListExEntity(sample);
  }

  @Put(`:id`)
  @ApiOperation({ summary: '編集' })
  @ApiOkEnvelopedResponse({
    type: SampleExEntity,
  })
  async update(
    @Param('id', ParseIntPipe) sampleId: number,
    @User() user: AuthedUser,
    @Body() dto: UpdateSampleDto,
  ): PromiseSampleExEntity> {
    const sample = await this.samplesService.update(
      sampleId,
      user,
      dto,
    );
    return mapToSampleListExEntity(sample);
  }

  @Put('assign')
  @ApiOperation({ summary: '一括更新' })
  @ApiOkEnvelopedResponse({
    type: SampleExEntity,
    isArray: true,
  })
  async assignSamplesToTests(
    @User() user: AuthedUser,
    @Body() dto: AssignSamplesToTestsDto,
  ): PromiseSampleExEntity[]> {
    const samples = await this.samplesService.assignSamplesToTests(
      user,
      dto,
    );
    return samples.map(mapToSampleListExEntity);
  }
}