Hi everyone, I wanted to try GAE for a tiny private project to test the technology.
I am working with a Data model looking like this: http://yuml.me/284c95e9 Persisting of each entity works fine. Just when I try to handle the associations, I am confused. i.e. in my example I have two associations between Person and ContactData. One holds all ContactData of a Person, the other marks the registrationData. The registrationData is included in all ContactData. As I learned, I cannot use a field of type ContactData and List<ContactData>, instead I have to use Key and List<Key>. Ok. got it. Person and ContactData (until now just Email) works. Now I want to search a Person with a specific email-address as registrationData. As far as I understand, I cannot use queries with joins, right? How do I run such kind of queries? Do I have to search all Emails and than another query with the found email-Key? How do I delete a Person with all ContactData? Manually with foreach- blocks? Overall I think this kind of data handling is not very handy. It throws us back to stoneage, because developers have to handle associations by their own... Martin -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
