MembershipRepository.java

package it.inaf.ia2.gms.persistence;

import it.inaf.ia2.gms.persistence.model.Group;
import it.inaf.ia2.gms.persistence.model.Membership;
import it.inaf.ia2.gms.persistence.model.MembershipId;
import it.inaf.ia2.gms.persistence.model.User;
import java.util.List;
import javax.transaction.Transactional;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
@Transactional
public interface MembershipRepository extends JpaRepository<Membership, MembershipId> {

    List<Membership> findBy_user(User user);

    List<Membership> findBy_group(Group group);
}