Q:

Bean validation is not working for spring webflux

I have refactored my code to use spring webflux but now @Valid stopped working.
It is not validating the request body.
@PostMapping(value = "/getContactInfo",produces = "application/json",consumes = "application/json")
public Flux<UserContactsModel> getUserContacts(@Valid @RequestBody Mono<LoginModel> loginDetail) {

    loginDetail.log();
    return contactInfoService
        .getUserContacts(loginDetailApiMapper.loginModelMonoToLoginBoMono(loginDetail))
        .flatMapIterable(
            userContactsBO -> contactInfoMapper.userContactBoToModelList(userContactsBO));
}

I am getting 200 OK in place of Bad request which I am returning from the controller advice.
Edit 1:
   import javax.validation.constraints.NotNull;
   import javax.validation.constraints.Pattern;

    public class LoginModel implements Serializable {

      private String clientId;

      @Pattern(regexp = "^[a-zA-Z0-9]*$", message = "Login ID is invalid")
      @NotNull
      private String loginId;
    }

update 1:
After changing the code like this and adding @Validated on class level
@RestController
@Validated
public class ContactInfoController implements ContactInfoApi {
public Flux<UserContactsModel> getUserContacts(@RequestBody  Mono<@Valid  LoginModel> loginDetail) {

I am getting javax.validation.ConstraintDeclarationException: HV000197: No value extractor found for type parameter 'T' of type reactor.core.publisher.Mono.

A:

Nothing worked for me. So I validated it manually by using javax.validator.
@Autowired private Validator validator;

 public Flux<UserContactsModel> getUserContacts(@RequestBody Mono<@Valid LoginModel> loginDetail) {

    return loginDetail
        .filter(this::validate)
        .map(....);
}

 private boolean validate(LoginModel loginModel) {

    Set<ConstraintViolation<LoginModel>> constraintViolations = validator.validate(loginModel);

    if (CollectionUtils.isNotEmpty(constraintViolations)) {
      StringJoiner stringJoiner = new StringJoiner(" ");
      constraintViolations.forEach(
          loginModelConstraintViolation ->
              stringJoiner
                  .add(loginModelConstraintViolation.getPropertyPath().toString())
                  .add(":")
                  .add(loginModelConstraintViolation.getMessage()));
      throw new RuntimeException(stringJoiner.toString());
    }

    return true;
  }

