Spring data rest - expose default methods

Question

I have a Person Repository as follows

@RepositoryRestResource
public interface PersonRepository extends Repository<Person, String> {
    List<Person> findAll();

    default List<Person> findNewPersons() {
         return findByStartDateAfter(LocalDate.now().minusMonths(3));
    }
    List<Person> findByStartDateAfter(LocalDate date);
}

I am not able to expose the default method through rest.. is there a way to do it without creating an implementation of the repo ?

findByStartDateAfter should be reachable via the search resource: http://docs.spring.io/spring-data/rest/docs/current/reference/html/#repository-resources.search-resource — benkuly, Apr 19 '17 at 09:41
I am able to reach `findByStartDateAfter` , I am looking to access the `findNewPersons` (the default method) — rathinakumar, Apr 20 '17 at 21:51

score 2 · Answer 1 · answered Sep 22 '18 at 04:51

I faced a similar problem, and was able to solve it using a SpEL expression inside an HQL query in a @Query annotation.

While nowhere near as clean as using a default method, this was the tidiest way I could find without writing a custom controller or introducing a custom implementation with a new DSL library or something for just this one query.

@Query("select p from Person p where p.startDate > :#{#T(java.time.LocalDate).now().minusMonths(3)}")
List<Person> findNewPersons();

My actual query was different so I might have typoed the syntax here, but the idea is the same and it worked for my case (I was using a LocalDate parameter and finding timestamps on that day by using a findByTimestampBetween style query).

score 0 · Answer 2 · answered Jun 08 '23 at 19:15

First of all in the specific case best solution is to write query method.

To expose method to REST via @RepositoryRestResource need to create your own inteface which your class annotated with @RepositoryRestResource extends and then write Impementation for that interface.

@RepositoryRestResource
public interface PersonRepository extends Repository<Person, String>, 
MyNewPersonRepository { ... } 

public interface MyNewPersonRepository { 
   Optional<Person> getNewPerson(); 
}

public MyNewPersonRepositoryImpl implements MyNewPersonRepository {
   @Override 
   Optional<Person> getNewPerson() {
      return ...; 
   }
}

score 0 · Answer 3 · answered Jul 28 '23 at 12:50

@Configuration
public class AppRepositoryConfig implements RepositoryRestConfigurer {

    @Override
    public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config, CorsRegistry cors) {

        config.setExposeRepositoryMethodsByDefault(true);
    }
}

Spring data rest - expose default methods

3 Answers3