Spring HATEOAS Resource Assembler and Resource Links with many variables

Question

I'm working on REST API with Spring HATEOAS and the Spring stack, and i have some problems with links into resources. Here is my code : the Controller : ``` @RestController @RequestMapping("/apporteurs/{idInt}/ribs") public class RibController { @Autowired private RibResourceAssembler ribResourceAssembler; @Autowired private RibRepository ribRepository; /** * Methode GET permettant d'obtenir un Rib par son ID * * @param idRib ID du Rib * @return RibResource */ @RequestMapping(value = "/{idRib}", method = RequestMethod.GET) @ResponseBody public RibResource getRibById(@PathVariable Long idInt, @PathVariable Long idRib) { CurrentUserUtils.checkAuthorizationByApporteur(idInt); return ribResourceAssembler.toResource(ribRepository.getRibById(idRib)); } } ``` The Assembler : ``` @Component public class RibResourceAssembler extends ResourceAssemblerSupport<Rib, RibResource> { public static final long TMP_IDS = 1234L; @Autowired private RibResourceMapper ribResourceMapper; public RibResourceAs…

Accepted Answer

```
@Override
public RibResource toResource(Rib rib) {
    return createResourceWithId(rib.getId(), rib);
}
```

`createResourceWithId()` internally creates a self link based on the controller's URL. In your case that contains the placeholder `{idInt}` so you would have to provide a parameter for that:

```
CustomUserDetails user = CurrentUserUtils.getCurrentUser();
return createResourceWithId(rib.getId(), rib, user.getIdInt());
```

The better choice would be not to call `createResourceWithId()` at all. Just move everything you now have in `instantiateResource()` to `toResource()`.

Spring HATEOAS Resource Assembler and Resource Links with many variables

Solution

Problem