- def chunk_queryset(queryset, chunk_size=20):
- ordered_queryset = queryset.order_by("-pk") # bias to newest items first
- chunk = ordered_queryset[:chunk_size]
- while chunk:
- last_pk = None
- for item in chunk:
- last_pk = item.pk
- yield item
- chunk = ordered_queryset.filter(pk__lt=last_pk)[:chunk_size]
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