hi! I'm progressing on the implementation of the Neo4j integration for Hibernate OGM and I think that I've bumped into a missing piece of info when mapping associations.
Let me explain: in Neo4j (in any grap database really) it would be very natural to map an association of 2 entities as a relationship among 2 nodes (where each node represents an entity). This was the path I was taking but then I've realized that I'm probably missing a piece of info that would allow me to connect 2 nodes together. Looking at the OGM docs and debugging I've realized that (at least today) I've got only following pieces of info available in the AssociationKey: - table name for the association owning entity - a set of column names / column values corresponding to a primary key of the target entity. Moreover, 'columnNames' in AssociationKey got a predefined names in form of [o:property name]_[t:pk_field1], [o:property name]_[t:pk_field2] etc. (where 'o' stands for the owning entity and 't' for the target one). What I would like to (ideally) do is to map an association as a Neo4j relationship between 2 nodes (each node corresponding to an entity) where the relationship would be named as [o:property name]. Unfortunately I'm facing 2 issues: 1) I don't have access to EntityKey's of 2 ends of the association (or at least I don't know how to access this info). I've noticed that Emmanuel works on providing a valid EntityKey inside a AssociationKey (https://github.com/emmanuelbernard/hibernate-ogm/tree/OGM-177) - I guess it would solve half of my problems :-) 2) Naming strategy of column names in AssociationKey ([o:property name]_[t:pk_field1]) makes it difficult to get a hand on a [property name] - I would like to avoid splitting on '_' as it is very fragile. I'm still quite new to Hibernate OGM so I'm not sure if I'm approaching the problem from the right angle. I would really like to keep mapping as natural to Neo4j / graph DB way of thinking so I would be grateful for any feedback. Cheers, Pawel _______________________________________________ hibernate-dev mailing list hibernate-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev
