public async Task <PopularResult <MaintenanceDto> > GetAsync(int id) { var result = new PopularResult <MaintenanceDto>(); var maintenance = await _maintenanceRepository.GetAsync(id); if (maintenance == null) { result.Failed("数据不存在"); return(result); } var dto = ObjectMapper.Map <MaintenanceEntity, MaintenanceDto>(maintenance); result.Success(dto); return(result); }