I'm using Hibernate Validator with Spring Boot. I have a variable in a class that I annotated like below.
Public class User {
#Pattern(regexp=".+#.+\\..+", message="Wrong email!")
private String userEmail;
}
I'm using the validation in a controller.
#PostMapping("/users")
public ResponseEntity addUser(#Valid #RequestBody User user, BindingResult result) {
if(result.hasErrors()) {
log.info("There are errors in the input");
}
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<User>> inputErrors = validator.validate(user);
log.info("Errors: " + inputErrors.toString());
}
Is there an easier why to access the validation messages then through the factory? Something like
result.getMessage();
You can autowire message source to your controller
#Autowired
private MessageSource messageSource;
and get the message
messageSource.getMessage(<your key from the error>, null, locale);
You ned locale to get properly localized text. You need to iterate the errors to get all messages for all found validation errors.
Related
I want to pass org.springframework.validation.Errors to CodeValidator class.
But, since I am not using RequestBody/RequestPart/ModelAttribute, I cannot put Errors in method param after variable.
I use #RequestParam for code variable, and I want to validate that using CodeValidator class that implement org.springframework.validation.Validator.
Here is my code
#RequestMapping(value = "/check-code", method = RequestMethod.POST)
public ResponseEntity<Object> checkCode(#RequestParam("code") String code, Errors errors) {
codeValidator.validate(code, errors);
if(errors.hasErrors()) {
return ResponseEntity.badRequest().body("Errors");
}
return ResponseEntity.ok("");
}
and here error result for my code:
An Errors/BindingResult argument is expected to be declared immediately after the model attribute, the #RequestBody or the #RequestPart arguments to which they apply: public org.springframework.http.ResponseEntity com.example.myapp.controller.CodeController.checkCode(java.lang.String,org.springframework.validation.BindingResult)
what should I do to be able using CodeValidator with #RequestParam?
Updated:
Code for CodeValidator
#Service
public class CodeValidator implements Validator {
#Override
public void validate(Object target, Errors errors) {
String code = ((String) target);
if(code == null || code.isEmpty()) {
errors.rejectValue("code", "", "Please fill in Code.");
}
}
}
Did you create an annotation with your validator?
Otherwise take a look at a small example/tutorial for custom validating with spring: https://www.baeldung.com/spring-mvc-custom-validator
(edit) if you are using spring boot you might need add a MethodValidationPostProcessor bean to your spring config to enable custom valdation for the #requesParam
i have problem with Thymeleaf when validating form. I'm trying to create simple user register form to learn Spring and i'm unfortunately stuck.
Here is my UserForm class
public class UserForm {
#NotEmpty
private String username;
#NotEmpty
private String password;
#NotEmpty
private String passwordConfirm;
\\ Getters and Setters
}
First problem is when I add my custom validator class in initBinder
#Autowired
private UserFormValidator formValidator;
#InitBinder
public void initBinder(WebDataBinder binder) {
binder.setValidator(formValidator);
}
"Default" annotated by #NotEmpty validation stops working. This is exptected behavior?
Second problem is how can I show global reject messages in thymeleaf?
My validator class is like below
public class UserFormValidator implements Validator {
#Autowired
UserService userService;
#Override
public boolean supports(Class<?> clazz) {
return UserForm.class.isAssignableFrom(clazz);
}
#Override
public void validate(Object target, Errors errors) {
UserForm userForm = (UserForm) target;
if(!userForm.getPassword().equals(userForm.getPasswordConfirm())) {
errors.reject("passwords.no.match", "Passwords not match");
}
if(userService.findOneByUsername(userForm.getUsername()).isPresent()) {
errors.reject("user.exist", "User already exists (default)");
}
}
}
and post mapping from controller
#PostMapping("/create")
public String registerUser(#ModelAttribute("form") #Valid final UserForm form, BindingResult bindingResult) {
if(bindingResult.hasErrors()) {
return "newuser";
}
userService.saveUser(form);
return "redirect:/";
}
As "default" validation errors i can show by using exth:if="${#fields.hasErrors('passwordConfirm')}" i have no idea how can i show message for error passwords.no.match or check if this error occured?
By default spring boot uses bean validation to validated form object annotated with #Valid. If you want to use your custom validator and register it through #InitBinder, then bean validation will not take place, this is expected behavior. If you want to bean validation also works with your custom validation you need to do it manually inside your validator class or even in controller.
Here comes your second problem to show password not match error message. Inside your custom validator UserFormValidator.class while rejecting any value you need to use rejectValue() method like below:
#Override
public void validate(Object target, Errors errors) {
UserForm userForm = (UserForm) target;
if(!userForm.getPassword().equals(userForm.getPasswordConfirm())) {
errors.rejectValue("passwordConfirm", "passwords.no.match", "Passwords not match");
}
if(userService.findOneByUsername(userForm.getUsername()).isPresent()) {
errors.rejectValue("username", "user.exist", "User already exists (default)");
}
}
The rejectValue() method is used to add a validation error to the Errors object.
The first parameter identifies which field the error is associated with. The second parameter is an error code which acts a message key for the messages.properties file (or messages_en.properties or messages_fr.properties etc, if these are being used). The third parameter of rejectValue() represents the fallback default message, which is displayed if no matching error code is found in the resource bundle.
Now you can show error messages using th:if="${#fields.hasErrors('passwordConfirm')} inside your form.
I have this message source bean. It works well for getting messages, e.g. from org.springframework.validation.Validator.
#Bean(name = "messageSource")
public ReloadableResourceBundleMessageSource messageSource() {
ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
messageSource.setCacheSeconds(-1);
messageSource.setFallbackToSystemLocale(false);
messageSource.setDefaultEncoding("UTF-8");
messageSource.setBasename("classpath:/locale/messages");
return messageSource;
}
and I would like to use this bean for processing JSR 349 validation messages for such POJO class:
public class AuthorizationRequest {
#NotEmpty
//#NotEmpty(message = "validation.notEmpty")
#JsonProperty("response_type")
private String responseType;
#NotEmpty
//#NotEmpty(message = "validation.notEmpty")
#JsonProperty("client_id")
private String clientId;
#NotEmpty
//#NotEmpty(message = "validation.notEmpty")
#JsonProperty("redirect_uri")
private String redirectUri;
private String scope;
// the rest omitted
}
But error messages from are still (localized) original Hibernate, such {org.hibernate.validator.constraints.NotEmpty.message}. But I would like to use my own error messages. I have tried many options but none of them work.
I would like to remain one message properties file for whole application.
Question
Is there some way how to tell Spring to use my messageSource bean?
Are you sure this is not working(commented lines)? Placing your messages in property file (resources/locale/message.properties) should work...
you need follow this format in Resource Bundle file.
ErrorType.className.fieldName = message.
example:
public class Call{
#Pattern(regexp = "^(http://|https://)?(www.)?([a-zA-Z0-9]+).[a-zA-Z0-9]*.[a-z]{3}.?([a-z]+)?$")
private String site;
}
and just define message in Resource Bundle like this
Pattern.call.site = site address is wrong.
I have a Roo generated application and use validation, spring security with a custom PermissionEvaluator and the generated web controllers. My entity has a field like this:
#NotNull
private Date creationDate;
This field is set automatically inside the controller's create method when saving the entity and is not included in the form (render="false").
#RequestMapping(method = RequestMethod.POST, produces = "text/html")
#PreAuthorize("hasPermission(#myEntity, 'create')")
public String create(#Valid MyEntity myEntity,
BindingResult bindingResult, Model uiModel,
HttpServletRequest httpServletRequest) {
// ... check binding result
myEntity.setCreationDate(new Date());
myEntity.persist();
// ...
}
The problem is, that validation always fails because it runs before the field is set. The PermissionEvaluator (called by #PreAuthorize) is also missing the value. How can I place my code somewhere between data binding and validation so that the entity is complete right from the beginning?
To solve the problem of #PreAutorize move the persistence logic to a #Service bean and call it from the controller. This way security check will be after validation. Roo can help you on it with service command.
Second, you can use validation groups to make different validation on for the same entity. This and this are two howto post.
An example:
#RequestMapping("/myEntity")
public MyEntityController {
#Autowired
MyEntityService myEntityService;
#RequestMapping(method = RequestMethod.POST, produces = "text/html")
public String create(#Validated({Account.ValidationStepOne.class}) MyEntity myEntity,
BindingResult bindingResult, Model uiModel,
HttpServletRequest httpServletRequest) {
// ... check binding result
myEntityService.save(myEntity);
//...
}
}
#Service
public MyEntityService {
#PreAuthorize("hasPermission(#myEntity, 'create')")
public save(MyEntity myEntity) {
//...
myEntity.setCreationDate(new Date());
myEntity.persist();
}
}
Good luck!
I've been trying to add custom messages for validation errors for a REST Service managed by Spring MVC within a #Controller class.
The Employee class:
public class Employee {
#NotNull
#NotEmpty
private String company;
...
}
My REST Service:
#ResponseStatus(value = HttpStatus.CREATED)
#RequestMapping(method = RequestMethod.POST)
public void add(#RequestBody #Valid Employee employee) {
employees.add(employee);
}
And the validation errors parses
#ResponseStatus(value = HttpStatus.BAD_REQUEST)
#ExceptionHandler(MethodArgumentNotValidException.class)
public #ResponseBody
List<String> validationExceptions(MethodArgumentNotValidException e) {
List<String> errors = new ArrayList<String>();
for (FieldError error : e.getBindingResult().getFieldErrors()) {
errors.add(error.getDefaultMessage());
}
return errors;
}
So I've put a ValidationMessages.properties on the root of my classpath, and I'm not able to get my custom messages with the following key NotEmpty.employee.company.
I know there are many ways to do this with a ResourceBundle and error.getCode(), or even with the key org.hibernate.validator.constraints.NotEmpty.message, but I'd like have specific messages to specific field of specific objects.
I also don't want to do this with #NotEmpty(message = "NotEmpty.employee.company}"). I want it the simplest.
What should I do?
Have you tried to implement your own
org.springframework.validation.MessageCodesResolver
and then declaring your implementation in the config file:
<mvc:annotation-driven message-codes-resolver="org.example.YourMessageCodesResolverImpl"/>
I'd give it a try, it seems this one is able to build custom error codes like the ones you want:
String[] resolveMessageCodes(String errorCode, String objectName, String field, Class<?> fieldType)
The only and important thing I'm not sure is whether it'll override the error codes generated by the hibernate validators...
I hope it helps (and works).
Cheers,
Chico.