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I use Spring Data Rest and I can not understand why my RepositoryRestController does not work. Its code: 

 @RepositoryRestController public class Cntrl { @Autowired private UserDao userDao; @RequestMapping(name = "/users/{id}/nameOne",method = RequestMethod.GET) @ResponseBody public PersistentEntityResource setNameOne(@PathVariable("id") Long id, PersistentEntityResourceAssembler persistentEntityResourceAssembler){ User user = userDao.findById(id).orElseThrow(()->{ throw new ServerException("Wrong id"); }); user.setLogin("One"); userDao.save(user); return persistentEntityResourceAssembler.toFullResource(user); } }

And Spring Boot start class:

 @SpringBootApplication @EnableWebMvc @EnableScheduling @EnableJpaRepositories @EnableSpringDataWebSupport public class Application { public static void main(String[] args) throws Exception { SpringApplication.run(Application.class, args); } }

When i go to base path (localhost:8080/api) everything is fine, but when send GET to request to localhost:8080/api/users/1/nameOne I get empty response, i dont have other controllers and I have user with id 1, so why it is not working ?

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  • 1
    Any informations in the server logfiles? Commented Apr 14, 2019 at 12:46
  • nothing, server doesn't react to the request Commented Apr 14, 2019 at 13:45

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It doesn't work because the URL structure you are using has already a meaning in Spring Data Rest context.

/{repository}/{id}/{column} URL is handled at RepositoryPropertyReferenceController.followPropertyReference method.

/api/users/1/nameOne means: get the nameOne column of the user with the id of 1. An important note is that: this column should reference another @Entity. This means if you have a String column named "surname" and you hit the URL /api/users/1/name you will get 404 because this column is not referencing another entity. If you have a column named school which references to a School entity and you hit the URL /api/users/1/school you will get the referenced school entity for that user. If the user does not have a school then you will get 404 again.

Also, @RepositoryRestController can be used for @RequestMapping if the URL you are giving isn't colliding with Spring Data Rest.

You can test that with the following example:

@RepositoryRestController public class CustomRepositoryRestController { @RequestMapping(path = "/repositoryRestControllerTest", method = RequestMethod.GET) @ResponseBody public String nameOne() { return "test"; } }

Visit http://localhost:8080/repositoryRestControllerTest

I hope this explanation clarifies things for you.

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Ye, you are right! I understood it few days ago, but forgot to write answer to this question! Anyway, thanks !
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If localhost:8080/api is your root context, then localhost:8080/api/users/1/nameOne should be the url you are using for the user GET.

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As far as I could figure out, if you use a RepositoryRestController you must activate the path using a corresponding RestRepositoryResource, before it's available in a controller, i.e. this would work:

// new code @RepositoryRestResource(path = "/users") public interface UserDaoRepository extends Repository<UserDao, String> {} // your code @RepositoryRestController public class Cntrl { @Autowired private UserDao userDao; @RequestMapping(name = "/users/{id}/nameOne",method = RequestMethod.GET) @ResponseBody public PersistentEntityResource setNameOne(@PathVariable("id") Long id, PersistentEntityResourceAssembler persistentEntityResourceAssembler){ User user = userDao.findById(id).orElseThrow(()->{ throw new ServerException("Wrong id"); }); user.setLogin("One"); userDao.save(user); return persistentEntityResourceAssembler.toFullResource(user); } }

Alternatively, you could opt to use a BasePathAwareController instead of RepositoryRestController, which does not require a resource.

@BasePathAwareController // <<<< NOT @RepositoryRestController public class Cntrl { @Autowired private UserDao userDao; @RequestMapping(name = "/users/{id}/nameOne",method = RequestMethod.GET) @ResponseBody public PersistentEntityResource setNameOne(@PathVariable("id") Long id, PersistentEntityResourceAssembler persistentEntityResourceAssembler){ User user = userDao.findById(id).orElseThrow(()->{ throw new ServerException("Wrong id"); }); user.setLogin("One"); userDao.save(user); return persistentEntityResourceAssembler.toFullResource(user); } }
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