CODEWITHSUNDEEP
javaspringhibernatevalidation
Piwo
Piwo

Reputation: 1509

Spring - Validation of custom constraints

I have a custom annotation @UniqueModel, which is validated by a ConstraintValidator: 

@Component
public class UniquePlaceValidator implements ConstraintValidator<UniqueModel, Model> {

    @Autowired
    private ModelRepository repository;

    public UniqueModelValidator() {
    }

    public void initialize(UniqueModel constraint) {
    }

    @Override
    public boolean isValid(Model model, ConstraintValidatorContext context) {
        if (repository == null)
            return true;

        Model dbModel = repository.findByNameAndMail(model.getName(), model.getMail());
        return dbModel == null;
    }

The problem is, that I need to do the validation before the safe()-method of the repository is called, otherwise the field injection won't work.

I therefor created a delegate-method with a @Valid-annotation, in order to force the unique-validation before:

Model save(@Valid Model model {
        return repository.save(model);
    }

Unfortunately this doesn't work, it seems like the @Valid-annotation is ignored by Spring.

How can I assure the correct timing of validation?

Upvotes: 0

Views: 984

Answers (1)

Robin
Robin

Reputation: 3386

Depending on your Bean validation configuration you may need to annotate your repository bean with @ValidateOnExecution.
But I'm not sure if Spring does support this annoation (see SPR-10641) hence I'm using Spring's own @Validated annotation in my repository and service interfaces and method level validation works fine!
See also this question and have a look into MethodValidationPostProcessor which clearly states "Target classes with such annotated methods need to be annotated with Spring's @Validated annotation at the type level". So it seems to be pretty clear that you have to use @Validated instead of @ValidateOnExecution until SPR-10641 is fixed.

Upvotes: 1

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