just found this but this was working for a while for me.
No Use of Filters That Match Entities Missing a Property
It is not possible to query for entities that are missing a given property. One
alternative is to create a fixed (modeled) property with a default value of
None, then create a filter for entities with None as the property value.
On Apr 28, 2011, at 3:45 PM, andreas schmid wrote:
> hi,
>
> for a while i was able to filter on missing properties like:
>
> MyModel.all().filter('title =', None).fetch(100)
>
> but i just found out i cant any more... why?
> is there another way to do this?
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