개인과제 트러블슈팅 - 일정 관리 앱

 

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메모 수정 API를 작성하던 중

@PutMapping("/{id}")
public ResponseEntity<ScheduleResponseDto> updateSchedule(
        @PathVariable Long id,
        @RequestBody ScheduleRequestDto requestDto
){
    return new ResponseEntity<>(scheduleService.updateSchedule( id,
            requestDto.getTitle(),
            requestDto.getContents(),
            requestDto.getName()), HttpStatus.OK);
}

 

reason: inference variable T has incompatible bounds
      equality constraints: ScheduleResponseDto
      lower bounds: ResponseEntity<ScheduleResponseDto>
  where T is a type-variable:
    T extends Object declared in class ResponseEntity 에러가 발생하였다.

 

 

public ResponseEntity<ScheduleResponseDto> updateSchedule(
		Long id, 
        String title, 
        String contents, 
        String name
        ){
        
        Schedule schedule = scheduleRepository.getSchedule(id);

        if(schedule == null) {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        if(title == null || contents == null || name == null){
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }

        schedule.update(title, contents, name);
        return new ResponseEntity<>(new ScheduleResponseDto(schedule), HttpStatus.OK);
    }

 

updateSchedule 메서드가 이미 ResponseEntity<ScheduleResponseDto>를 반환하도록 작성되어 있기 때문에 발생한 오류였다.

 

 

return scheduleService.updateSchedule( id,
                requestDto.getTitle(),
                requestDto.getContents(),
                requestDto.getName());

 

컨트롤러에서 ResponseEntity를 다시 감싸지 않고 반환하여 해결해주었다.