I had to deal with the same issue myself.
I did this:
class DeleteFull():
def execute(self):
deleting = model_class_name.all().order('__key__').fetch(100)
while deleting:
a = []
key = deleting[-1].key()
for item in deleting:
a.append(item)
db.delete(a)
deleting = model_class_name.all().filter('__key__ >',
key).order('__key__').fetch(100)
This purged everything, but it took a hell of a long time.
On Tue, May 4, 2010 at 11:08 AM, Patrick Twohig
<patr...@namazustudios.com> wrote:
> Recently, I have refactored my code such that I no longer need entities of a
> particular kind. I was curious how I would go about writing a task to
> delete these entities in bulk. I have set up a task that performs a query
> specifying only the kind, and then using a cursor to delete the entities on
> the task queue. However, when I run the task it seems to complete
> prematurely rather than delete all entities.
>
> Here's the process I use:
>
> I perform a query for all entities of a particular kind. For instance
> "SELECT * FROM SomeKind" or new Query("SomeKind") in Java.
> I delete as many entities as I can using the results of the query until I
> hit a soft deadline. I set that up myself to be 10 seconds, or so.
> If there are more results left, I generate a cursor and pick up again and
> re-queue the task to execute again.
> If there are no results left, I just leave finish the task logging the
> result.
>
> The problem is, the task seems to finish prematurely and it appears to
> either delete only a few hundred entities, or it simply skips a few here and
> there. Running it in the debugger, it all seems to work well, but on the
> AppEngine it doesn't seem to work quite as well. Any thoughts or
> suggestions?
>
> Thanks,
> Patrick.
>
> --
> Patrick H. Twohig.
>
> Namazu Studios
> P.O. Box 34161
> San Diego, CA 92163-4161
>
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--
Sincerely yours,
Jawaad Mahmood
http://www.jawaadmahmood.com
080-4204-7198
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