The document actually says query iterator is batched already.
http://code.google.com/appengine/docs/datastore/queryclass.html
On Oct 22, 6:31 pm, Alexander Kojevnikov <[EMAIL PROTECTED]>
wrote:
> Alex,
>
> Django really doesn't care if it's a query object or not. As long as
> it's a valid iterator, the {% for %} tag will work.
>
> However, if your query returns a lot of entities, it will be more
> efficient to prefetch them with fetch(). Iteration retrieves the
> entities in batches, if the batch size is less than the number of
> entities the query returns - you will have multiple roundtrips to the
> datastore.
>
> HTH,
> Alex
>
> --www.muspy.com
>
> On Oct 23, 5:52 am, Alex Vartan <[EMAIL PROTECTED]> wrote:
>
> > Hi,
>
> > This is a newbie-ish sort of question, but I've got an entity that
> > includes an implicitly defined collection:
>
> > Person.contact_set
>
> > as my Contact object has a ReferenceProperty that refers to the Person
> > entity.
>
> > I know from the tutorials that contact_set is a query object and thus
> > requires a fetch, unless it is used as an iterator. My question is,
> > can I use the Django templat {%for...} construct to access
> > Person.contact_set in the template, or do I need to do a fetch in my
> > python code and assign the results in the dictionary of key-value
> > pairs passed as template_data?
>
> > Thanks. This could be a bit more clear in the docs unless I missed
> > something.
> > Alex
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