I am experiencing an issue while a mandatory field is not filled, the following exception is displayed in the logs:
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
Lets say I have an object CodeRequest that contains an attribute as follows:
@NotBlank(message = "payloadFormatIndicator.required")
@Size(max = 2, message = "payloadFormatIndicator.size")
private String payloadFormatIndicator;
My controller have the object CodeRequest as parameter as shown below:
@PostMapping(value = "/dummy", produces = MediaType.IMAGE_PNG_VALUE)
public ResponseEntity<BufferedImage> generateQRCode(@Valid @RequestBody CodeRequest paymentRequest) throws Exception {
log.debug("generateQRCode with the following request {}", paymentRequest);
return ResponseEntity.status(HttpStatus.OK).body(ipsPaymentService.generateQRCode(paymentRequest));
}
When I leave the mandatory field payloadFormatIndicator empty I expect to get an error message that payloadFormatIndicator.required is required in my response.
However, I get the following error message in the log:
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
My exception handler is shown below:
@Slf4j
@ControllerAdvice
public class RestControllerExceptionHandler extends ResponseEntityExceptionHandler {
@Override
public ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException exception, HttpHeaders headers,
HttpStatus status, WebRequest request) {
log.error(exception.getMessage(), exception);
ExceptionResponse exceptionResponse = new ExceptionResponse(HttpStatus.BAD_REQUEST,
exception.getBindingResult().getAllErrors().get(0).getDefaultMessage());
return new ResponseEntity<>(exceptionResponse, new HttpHeaders(), exceptionResponse.getHttpStatus());
}
It looks like because the method generateQRCode is returning ResponseEntity<BufferedImage> it is causing this issue because for the other methods on my controller, the exception handling is working fine.
I am using swagger to test the rest API and the content type is shown below:
Any idea how I can fix it pls?
