Spring MVC - @Valid on list of beans in REST service

Question

In a Spring MVC REST service (json), I have a controller method like this one :

@RequestMapping(method = RequestMethod.POST, value = { \"/doesntmatter\" })
         


        

Answer 1

The only way i could find to do this is to wrap the list, this also means that the JSON input would have to change.

@RequestMapping(method = RequestMethod.POST, value = { "/doesntmatter" })
@ResponseBody
public List<...> myMethod(@Valid @RequestBody List request, BindingResult bindingResult) {

becomes:

@RequestMapping(method = RequestMethod.POST, value = { "/doesntmatter" })
@ResponseBody
public List<...> myMethod(@Valid @RequestBody MyBeanList request, BindingResult bindingResult) {

and we also need:

import javax.validation.Valid;
import java.util.List;

public class MyBeanList {

    @Valid
    List list;

    //getters and setters....
}

This looks like it could also be possible with a custom validatior for lists but i have not got that far yet.

The @Valid annotation is part of the standard JSR-303 Bean Validation API, and is not a Spring-specific construct. Spring MVC will validate a @Valid object after binding so-long as an appropriate Validator has been configured.

Reference : http://docs.spring.io/spring/docs/current/spring-framework-reference/html/validation.html