Display only default message of Spring boot validation - MethodArgumentNotValidException

Question

How can i strip down the excessive information from MethodArgumentNotValidException and keep only the required "default message" ??

I am experimenting with Validation annotations- @NotNull, @NotBlank, and @NotEmpty

I have configured a custom error message as below:-

@NotNull(message = "Aaaah !!!! firstname cannot be empty !!!")
private String firtName;

My Exception handler is :-

@RestControllerAdvice
public class ControllerAdviceClass {
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public ResponseEntity handleValidationException(MethodArgumentNotValidException ex)
    {
        return new ResponseEntity(ex.getMessage() , HttpStatus.BAD_REQUEST);
    }
}

But the exception message i see on swagger is :-

Validation failed for argument [0] in public cosmosdb.User cosmosdb.CosmosController.postResult(cosmosdb.User): 
[Field error in object 'user' on field 'firstName': rejected value [null]; codes [NotNull.user.firstName,NotNull.firstName,NotNull.java.lang.String,NotNull];
 arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [user.firstName,firstName]; arguments []; default message [firstName]]; 
default message [Aaaah !!!! firstname cannot be empty !!!]]

I want to see only the default message * [Aaaah !!!! firstname cannot be empty !!!]] * and remove the extra bunkum.

Question_Everything · Accepted Answer · 2020-06-05 18:47:03Z

3

I had a similar experience with adjusting the default messages to something more meaningful.

You have to implement a javax.validation.MessageInterpolation interface. From there you'll be able to interpolate your default message.

I used this site as a reference to solve my issue. https://www.baeldung.com/spring-validation-message-interpolation

answered Jun 5, 2020 at 18:47

Question_Everything

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1 Comment

user1354825 Over a year ago

Do you mean this : baeldung.com/global-error-handler-in-a-spring-rest-api ?

Rupesh Patil · Accepted Answer · 2022-04-18 10:54:25Z

3

@Override
protected ResponseEntity<Object> 
handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
        HttpHeaders headers, HttpStatus status, WebRequest request) {
    logError(ex, HttpStatus.BAD_REQUEST);
    Map<String, String> errorMap = new HashMap<>();
    ex.getBindingResult().getFieldErrors().forEach(error -> {
        errorMap.put(error.getField(),error.getDefaultMessage());
    });
    return new ResponseEntity<>(errorMap, HttpStatus.BAD_REQUEST);
}

answered Apr 18, 2022 at 10:54

Rupesh Patil

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Comments

Mts · Accepted Answer · 2023-04-11 23:26:43Z

1

Simple solution using stream():

...
catch (MethodArgumentNotValidException ex) {
    message = ex.getFieldErrors()
        .stream()
        .map(fieldError -> fieldError.getField() + ": " + fieldError.getDefaultMessage())
        .collect(Collectors.joining("; "));
}
...

answered Apr 11, 2023 at 23:26

Mts

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Comments

Renjith · Accepted Answer · 2022-08-20 13:13:48Z

0

@Override
protected ResponseEntity<Object> handleMethodArgumentNotValid(
        MethodArgumentNotValidException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
    return new ResponseEntity<Object>(ex.getFieldError().getDefaultMessage(), HttpStatus.BAD_REQUEST);
}

answered Aug 20, 2022 at 13:13

Renjith

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Comments

salerokada · Accepted Answer · 2023-04-11 08:13:52Z

0

import org.springframework.context.support.DefaultMessageSourceResolvable;

public ResponseEntity handleValidationException(MethodArgumentNotValidException ex)
{
    List<String> errorMessages = ((MethodArgumentNotValidException)ex)
            .getBindingResult()
            .getFieldErrors().stream()
            .map(DefaultMessageSourceResolvable::getDefaultMessage)
            .collect(Collectors.toList());
    return new ResponseEntity(errorMessages.toString(), HttpStatus.BAD_REQUEST);
}

answered Apr 11, 2023 at 8:13

salerokada

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