Meine Gedankenhalde // My Braindump

I am trying to build an application on the google app engine and I am trying to implement a recursive data structure (pages that itself can have pages as children) I used JDO as it seems to be the most advanced ORM mapper for the google app engine.

But JDO refuses to save the entity. It just does nothing when I call makePersistent. The Id field (with the type “Key”) is no generated but the internal JDO fields change… (You can see that in the debugger).

It looks like this are known bugs since september 09…

I don’t understand why these bugs are not fixed with a higher priority, as they are pretty important for bigger apps. Of course one could emulate that by resolving the relations by hand, but where is the point of having an ORM when even these simple cases don’t work?

I’m not sure if I’ll suspend my project until these issues are resolved :-(

This is the bug that is responsible:

http://code.google.com/p/datanucleus-appengine/issues/…

These show more problems in that area:

http://code.google.com/p/datanucleus-appengine/issues/detail?….

http://code.google.com/p/datanucleus-appengine/issues/detail?….