#26780: Prefetch objects don't work with slices
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Reporter: Ludwik Trammer | Owner: nobody
Type: New feature | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: prefetch, slicing | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Haseeb Ahmad):
I think there is a workaround now to in django new version as we have
OuterRef and Subquery.
from django.db.models import OuterRef, Subquery
User.objects.all().prefetch_related('comments',
queryset=Comment.objects.filter(id__in=Subquery(
Comment.objects.filter(user_id=OuterRef('user_id')).values_list('id',
flat=True)[:5])))
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Ticket URL: <https://code.djangoproject.com/ticket/26780#comment:9>
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