Spring does not perform validation in REST controller

Question

I try to perform validation using javax annotations where data transfer object for User is being processed (UserDTO) but without expected success.

Here is controller:

@Controller
public class AuthenticationController {

@CrossOrigin(allowCredentials = "true")
@RequestMapping(value= "/postAccountData", method = RequestMethod.POST)

public @ResponseBody String postAccountData(@Valid UserDTO userData, 
BindingResult result) { 

System.out.println(" Is userData not null?  " + userData != null);

System.out.println("BindingResult : " + result + " has errors: " + 
result.hasErrors());

return "Response from POST account!";

}

}

Here is the object (UserDTO) :

public class UserDTO {

@NotNull
@NotEmpty 
public String firstName;

@NotNull
public String lastName;

@NotNull
@NotEmpty
public String password;
public String matchingPassword;

@NotNull
@NotEmpty
@NotBlank
public String email;

@NotNull
@NotBlank
public String description;

}

When I use Postman to sent (POST) data then it is correctly parsed as an UserDTO object but I am not able to trigger any error thus hasErrors() method returns false at each invocation when null fields are present in retrieved UserDTO object. What am I missing?

Add `@Validated` to any class that has the javax validation annotations. — Andy Brown, Aug 07 '19 at 07:44

score 0 · Answer 1 · answered Aug 06 '19 at 19:11

0

It is missing @RequestBody

public @ResponseBody String postAccountData(@RequestBody @Valid UserDTO userData, 
      BindingResult result) { 

      System.out.println(" Is userData not null?  " + userData != null);

      System.out.println("BindingResult : " + result + " has errors: " + 
      result.hasErrors());

      return "Response from POST account!";

answered Aug 06 '19 at 19:11

Jonathan JOhx

5,784
2
17
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No it does not work with @RequestBody either. Sorry – Sinny Aug 06 '19 at 19:11
@Sinny it looks weird so, if you can share a code repo so that we might help you. – Jonathan JOhx Aug 06 '19 at 19:19
I will try ASAP to make it public. Maybe I am missing some beans (Processors) that may be necessary? – Sinny Aug 06 '19 at 19:36
@Sinny pehaps you need to add getters and setters on those fields – Jonathan JOhx Aug 06 '19 at 22:11

Divanshu Aggarwal · Answer 2 · 2019-08-06T19:56:38.720

0

Try adding @Settter above UserDTO. Library = lombok

edited Aug 06 '19 at 19:56

answered Aug 06 '19 at 19:53

Divanshu Aggarwal

416
6
13

From which library does it come from? – Sinny Aug 06 '19 at 19:55

score 0 · Answer 3 · answered Aug 07 '19 at 05:32

0

Just tried your code 'as it is' in a spring boot application. Working fine, even without @RequestBody. I suggest to check your imports and validation library.

answered Aug 07 '19 at 05:32

YoManTaMero

391
4
10

Spring does not perform validation in REST controller

3 Answers3