@QueryResult

IdeaRepository.java

@Repository
public interface IdeaRepository extends GraphRepository<Idea> {
  
  @Query("MATCH (i:Idea) WHERE id(i) = {0} WITH i " +
            "OPTIONAL MATCH (u:User)-[:UPVOTE]->(i) " +
            "WITH i, collect(u) as upVoters " +
            "OPTIONAL MATCH (u:User)-[:DOWNVOTE]->(i) " +
            "RETURN id(i) as ideaId, upVoters, collect(u) as downVoters ")
    Iterable<IdeaVotesQueryResult> findVoters(Long id);
  
}

IdeaVotesQueryResult.java

public class IdeaVotesQueryResult {

    private Long ideaId;
    private Set<User> upVoters;
    private Set<User> downVoters;

    public Long getIdeaId() {
        return ideaId;
    }

    public void setIdeaId(Long ideaId) {
        this.ideaId = ideaId;
    }

    public Set<User> getUpVoters() {
        return upVoters;
    }

    public void setUpVoters(Set<User> upVoters) {
        this.upVoters = upVoters;
    }

    public Set<User> getDownVoters() {
        return downVoters;
    }

    public void setDownVoters(Set<User> downVoters) {
        this.downVoters = downVoters;
    }
}