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Possible Duplicate:
Querying for entities with missing properties in app engine Datastore?
I’m using Objectify4,
If a field is not set, from the datastore viewer we can see it is marked as <missing> or <null>, Is there a way to fetch these entities?
You cannot make queries for properties that are missing or not set for an Entity. However, you can query for properties that were initialized with
nullvalue. For more information take a look Restrictions on Queries.Hope this helps!