public async Task <IActionResult> PostBusStopTrace([FromBody] BusStopTrace busStopTrace) { if (!ModelState.IsValid) { return(BadRequest(ModelState)); } try { await _traceService.AddBusStopTraceAsync(busStopTrace); } catch (DbUpdateException) { return(BadRequest("please specify busStopId and hour")); } return(StatusCode(201)); }