Hi Frederic, Looking at the GitHub example, my recommendation is to avoid mapping Auditable in Cayenne as an entity. The easiest alternative is to make Auditable an interface and let appropriate entities implement it.
Andrus > On Jun 20, 2016, at 3:24 PM, Frederic Gilbart <fgilb...@capsiel.fr> wrote: > > Hi all, > > > > After further tests I think the problem is not relative to UUID nor primary > keys but to properties from super classes that seem never persisted. > > > > I've updated the Tutorial code to add a new class > org.apache.cayenne.tutorial.persistent.Auditable with has some basic > properties, then updated Artist class to override Auditable. > > Gallery does not override it but uses the 2 new properties, so I can compare > results. DBEntity is updated accordingly. > > > > Test sources are available on github > https://github.com/fredgi/Cayennetutorial/ > > > > Properties which are super class based are not persisted. Properties of the > ObjEntity are. > > > > One strange behavior : on first run, when tables are created, properties of > the superclass are returned not null, but not saved in database. On the > second run, when tables already exists the test fails : super properties are > null & not saved. > > > > I'm not familiar with Cayenne : I like concepts in use and try to evaluate > Cayenne for a project, I don't know if i use it poorly to get such results. > > > > Any help would be appreciated. > > > > Regards, > > Fred > > > > > > De : Frederic Gilbart > Envoyé : dimanche 19 juin 2016 21:16 > À : 'user@cayenne.apache.org' <user@cayenne.apache.org> > Objet : UUID as primary key > > > > Hi all, > > > > I'm looking for some information to use java.util.UUID as a «Meaningful > Primary Key » as stated in > https://cayenne.apache.org/docs/3.0/primary-key-generation.html . > > > > I've planned to use a Listener onPreUpdate to initialize the value. > > Every tries shown an Integer used in my VARCHAR column, and my UUID key > unused (but a sequence value instead) > > Modeler PK generation is « default ». > I'm using it that way > > @PostAdd(Audit.class) > public void postAdd(Audit object) { > object.setUuid(UUID.randomUUID()); > object.setCreatedBy("ME"); > object.setCreationDate(new Date()); > } > > Most of objects extends this abstract super class Audit. > > > Listerner is added to context at startup and triggered as expected. > > > > I'm using 4M3. > > > Do you know how to deal with this ? > > One more thing : for all abstract super classes, should I duplicate > properties on the overiding objects because without doing it values seems not > persisted ? > > Regards > Fred. >
