Opened 7 years ago

Closed 7 years ago

#27997 closed Bug (duplicate)

Can't get last() item of a paginator 'page'

Reported by: Thomas Capricelli Owned by: nobody
Component: Core (Other) Version: 1.10
Severity: Normal Keywords:
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


It's easy to reproduce with shell:

>>> from django.core.paginator import Paginator
>>> from xxx.models import *
>>> paginator = Paginator(YourFavoriteModel.objects.all(), 30)
>>> page =
>>> page.object_list.first() in page.object_list
>>> page.object_list.last() in page.object_list

# Even if unrolled:
>>> unrolled = [o for o in page.object_list]
>>> page.object_list.first() in unrolled
>>> page.object_list.last() in unrolled

Tested with python 2.7.13 and Django 1.8, 1.9 and 1.10.
I can reproduce it on several projects, with any Model that has an order defined in Meta. I can also reproduce for a Model that has none but adding an order_by("field") in the paginator=Paginator line.

What I do get with page.object_list.last() is indeed an item of the paginator queryset, but it doens't belong to the page, and is even far away. I have an example here where the item is in the middle of page 2 while i'm testing page 27 !

Change History (3)

comment:1 by Jon Dufresne, 7 years ago

I believe this is a duplicate of #22550 -- QuerySet last() and reverse() confusing when used with ordered slices.

comment:2 by Thomas Capricelli, 7 years ago

For the record, all my tests were done with sqlite.

comment:3 by Claude Paroz, 7 years ago

Resolution: duplicate
Status: newclosed
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