Nils,
Answered there, copying it here for completeness :)
Michael
If you use videoRepository.findById() it only looks on the video-repository
level (as it only knows about that). It creates a cypher query that uses:
start n = node:Video(id={0}) return n;
There is the @Indexed(level=IndexType.INSTANCE) attribute that makes the field
being indexed at the instance-class level and not at the level of the declaring
class of the field. I'm just thinking about adding another option that says
IndexType.HIERARCHY that adds an index-entry on all levels.
Could you please raise a JIRA issue for this.
Thanks a lot
Michael
Am 14.12.2011 um 09:17 schrieb Nils Kaiser:
> Hi,
>
> This is a cross post from
> http://forum.springsource.org/showthread.php?120071-Inheritance-in-spring-data-neo4j
>
>
>
> I'm using spring-data-neo4j in an object model with inheritance, with a
> base class Video, a subclass YoutubeVideo and a VideoRepository. The
> Video base class contains a field "id", which uses @Indexed
>
> When I save a Video instance with an id field a call to
> VideoRepository.findById returns the object.
>
> However, if I save a YoutubeVideo, the same call to
> VideoRepository.findById returns null.
>
> Why do I get a different behavior here?
>
> Here are the model classes:
>
>
> @NodeEntity
> public class Video {
> @GraphId
> public Long nodeId;
> @Indexed
> public String id;
> @Indexed
> public String title;
> public String description;
> public String originalTitle;
> public String thumbnailUrl;
> }
> public class YoutubeVideo extends Video {
> public String youtubeId;
> }
>
> public interface VideoRepository extends GraphRepository<Video>,
> NamedIndexRepository<Video>,
> RelationshipOperationsRepository<Video> {
> Video findById(String id);
> }
>
>
>
> Here is the test code I use. The second test fails.
>
> @Test
> public void findVideo() {
> Video video = new Video();
> video.setId("test.new");
>
> videoRepository.save(video);
> Video existing = videoRepository.findById(video.getId());
> assertNotNull(existing);
>
> videoRepository.delete(existing);
> existing = videoRepository.findById(video.getId());
> assertNull(existing);
> }
>
> @Test
> public void findVideoSubclass() {
> YoutubeVideo video = new YoutubeVideo();
> video.setId("test.subclass");
>
> videoRepository.save(video);
> Video existing = videoRepository.findById(video.getId());
> assertNotNull(existing); <--------- fails
>
> videoRepository.delete(existing);
> existing = videoRepository.findById(video.getId());
> assertNull(existing);
> }
>
> --
> Nils Kaiser
> MSc in Information Systems
>
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