Thymeleaf returning Java Exception message instead of my custom error message. How can I make it return what I want?

Question

I am implementing form validation and running into problems with BigInteger validation in thymeleaf's error messages. Here is my property annotation:

@Digits(integer = 9, fraction = 0, message="Must be a positive integer")
private BigInteger myInteger;

The Controller:

@PostMapping("/")
    public String whatever(@Valid @ModelAttribute Entity myEntity, BindingResult result) {
    
        if (result.hasErrors()) {
            return "index";
        }
        //TODO
        return "index"; 
}

And finally, the HTML code

<span th:if="${#fields.hasErrors('myEntity.myInteger')}"
th:errors="*{myEntity.myInteger}"></span>

Now, this is working fine for my other BigDecimal variables, but BigInteger causes Thymeleaf to display a NumberFormatException instead of my custom message "Must be a positive integer.", presumably because of some priority in error-handling that I am unfamiliar with. I have tried looking for answers but most of them direct me to some messages.properties based solution, which is not present in my project folder. What do I need to do to ensure my custom message is displayed instead of the NumberFormatException?

You can just create messages.properties in resources folder and add typeMismatch.table.myInteger = Must be a positive integer . Where table is your table name in lower case. — Seldo97
– Seldo97, Commented Oct 17, 2020 at 20:54
@Seldo97 Thank you so much! I had tried this before but it didn't work because I didn't type it in lower case, thank you for specifically pointing it out — ltome
– ltome, Commented Oct 17, 2020 at 21:31
@TypoTC I added the answer, you can mark it as solution of your problem. — Seldo97
– Seldo97, Commented Oct 17, 2020 at 21:56

Seldo97 · Accepted Answer · 2020-10-17 22:04:00Z

1

You can just create messages.properties in resources folder and add typeMismatch.table.myInteger = Must be a positive integer . Where "table" is your entity name in lower case.

edited Oct 17, 2020 at 22:04

answered Oct 17, 2020 at 21:56

Seldo97

7481 gold badge8 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Thymeleaf returning Java Exception message instead of my custom error message. How can I make it return what I want?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related