ordering a query set randomly
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Orcun Avsar
Oct 17, 2008, 1:46:14 PM10/17/08
to Django users
hi,
problem is that i want to order model instances for an attribute and
slice it. then sort list randomly.
>>query=order_by("date")[:20]
>>query.order_by("?")
returns an error because query set has been sliced
>>query=order_by("date")[:100]
>>random.shuffle(query)
also returns error bacuse query set doesn't behave like a list and
doesn't support item assignment.
dirty solution was creating a list contains model instances by putting
query in a for loop then shuffle it. is there any alternative solution.
problem is that i want to order model instances for an attribute and
slice it. then sort list randomly.
>>query=order_by("date")[:20]
>>query.order_by("?")
returns an error because query set has been sliced
>>query=order_by("date")[:100]
>>random.shuffle(query)
also returns error bacuse query set doesn't behave like a list and
doesn't support item assignment.
dirty solution was creating a list contains model instances by putting
query in a for loop then shuffle it. is there any alternative solution.
Steve Holden
Oct 17, 2008, 1:54:06 PM10/17/08
to django...@googlegroups.com
A much cheaper solution would be to create a list of range(20),
randomize that with shuffle and use successive elements to index the slice.
regards
Steve
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Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
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