That *should* create an index. We index null values, but we don't index
empty values. That is, if you have an entity:
Animal {
String name;
int age;
}
And create 100 entities, then add:
Animal {
String name;
int age;
String nickname;
}
The 100 entities that were created will have an EMPTY nickname and will not
be queryable by this attribute, but Animals created after the change that
populate this field will be indexable.
On Tue, Feb 23, 2010 at 9:58 PM, Jairo Vasquez Moreno <
[email protected]> wrote:
> Hi Nick,
>
> I know every write to Datastore creates an index entry for each indexable
> value. But when a value is not set (None) will an index entry be created?
>
> My doubt is, is it better to let a property None and then filter by
> property=None or set the with something e.g property="-1" and then filter by
> property="-1". Because I'm leaving a property as None and then doing some
> stuff with those entity with None but this is generating more
> DeadLineExcedeed errors as expected (even decreasing the number of entities
> to fetch) so I think maybe the filter is getting to much time and I don't
> know what else could be.
>
> Thanks in advance.
>
> --
> Jairo Vasquez Moreno
> Mentez Developer
> www.mentez.com
> Medellin - Colombia
>
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--
Ikai Lan
Developer Programs Engineer, Google App Engine
http://googleappengine.blogspot.com | http://twitter.com/app_engine
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