Spring boot validation doesn't work

Question

I have Spring boot application and I can't show error message to user. Object without that data is not saved in the database and that is OK. But showing error message is the problem. When I debug i get errors size = 0

This is my model:

 @Size(min = 1, message = "Address is invalid.")
 @NotNull
 @Column
 private String address;

Controller

  @RequestMapping(value = "/create", method = RequestMethod.POST, 
  consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
  public String createNewBusiness(@Valid @ModelAttribute("business") 
  Business business, BindingResult result, Model model) {
  model.addAttribute("userEmail", getUserEmail());
   logger.info("/business/create:" + business.toString());
  LocationResponse locationResponse = geoService.getCoords(business.getAddress());

if(locationResponse.getStatus().equals("OK")) {
    business.setLatitude(locationResponse.getResults().get(0).getGeometry().getLocation().getLat());
    business.setLongitude(locationResponse.getResults().get(0).getGeometry().getLocation().getLng());
    business.setUserId(getUserId());

    businessService.createNew(business);

    model.addAttribute("business", business);

}else{
    business.setAddress(null);
    model.addAttribute("business", business);

}

if(result.hasErrors()){
    List<FieldError> errors = result.getFieldErrors();
    for (FieldError error : errors ) {
        System.out.println (error.getObjectName() + " - " + error.getDefaultMessage());
    }
    return "newBusiness";
}

return "business";

}

And Thymeleaf

<div class="input-field left m-0 w-100">
                        <i class="fa fa-map-marker prefix grey-text" aria-hidden="true"></i>
                        <input placeholder="Address" id="inputAddress" name="address" type="text" class="validate my-0" th:required="true">
                        <label th:errors="*{address}" th:if="${#fields.hasErrors('address')}" >Invalid address </label>
                    </div>

Does my solution work for you? Please let me know about it (later). — LenglBoy
– LenglBoy, Commented Mar 26, 2018 at 13:59
You´re validating buisness but you want the adress to be valid and enter it on UI. Is this field part of the buisness-Entity? — LenglBoy
– LenglBoy, Commented Mar 27, 2018 at 8:10
Try to use the field ID on UI for showing up the message. So you shopuld use inputAddress instead of adress on .hasErrors(). Last think I would expect is that you need to use the field-id... — LenglBoy
– LenglBoy, Commented Mar 27, 2018 at 11:38

LenglBoy · Accepted Answer · 2018-03-27 12:20:25Z

2

You need to use @Valid and on some also @ModelAttribute for the parameter of createNewBusiness() - depending on your parameters and stuff.

Also you need to add th:field="*{adress}" to your inputfield because it´s the ID of this inputfield in the framework.

So in you case the method header will look like this:

public String createNewBusiness(@ModelAttribute Business business,
    @Valid Model model, BindingResult result) {
    // ...
}

edited Mar 27, 2018 at 12:20

answered Mar 26, 2018 at 13:40

LenglBoy

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Comments

Ognjen Mišić · Accepted Answer · 2018-04-20 11:48:14Z

If you want to throw a custom validation error (for example, if you're validating a field by something other than the annotation validators in your model), you can do that through BindingResult#rejectValue() method. For example:

if (business.getEmail()  == null || business.getEmail().length() == 0) {
    result.rejectValue("email", "email.missing", "Must enter email");
}

Obviously email field is just an example, as you would need that email field on your thymeleaf resource as well as the error field.

More on this topic at https://docs.spring.io/autorepo/docs/spring-framework/3.2.8.RELEASE/javadoc-api/org/springframework/validation/Errors.html#rejectValue(java.lang.String,%20java.lang.String,%20java.lang.Object[],%20java.lang.String)

marc_s · Accepted Answer · 2025-04-24 20:06:28Z

0

I am a beginner in Spring Boot, so this was a small project for learning. And I am facing this issue, so what I did, I passed all the error has a list to the html as errorlist then used the each function to get the specific error for each element:

@PostMapping("/")
public String save(Model model, @Validated ProductEntity product, BindingResult result) {
    if (result.hasErrors()) {
        model.addAttribute("product", product);
        model.addAttribute("errorlist",result.getAllErrors());
        return "index";
    }

    productRepo.save(product);
    model.addAttribute("msg", "Added Product");
    model.addAttribute("product", new ProductEntity()); 
    return "index";
}

And the html to show the error was:

<div th:each="error : ${errorlist}" th:if="${error.objectName == 'productEntity' && error.field == 'price'}" th:text="${error.defaultMessage}"></div>

I was not able to find the message for invalid data using this:

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

I hope this will help.

edited Apr 24 at 20:06

marc_s

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answered Sep 30, 2024 at 17:38

Pradwin Sherigar

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