I want to make this request: "Choose a name from Person where Address =" "OR age =" "". Is this possible in the GAE model. All things include AND closure, not OR. How can I do this using JDO / JPA, Objectify. thanks in advance
There is no OR operation in the data store. You must make two separate queries and find the intersection in your own code.
http://code.google.com/appengine/docs/python/datastore/gqlreference.html
I recommend anyone who is having difficulty with the GAE data model to watch this video. It explains how this works, then you will understand why there are limitations.
http://sites.google.com/site/io/under-the-covers-of-the-google-app-engine-datastore
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