Opened 7 years ago

Closed 7 years ago

#17523 closed Bug (duplicate)

Slicing: EmptyQuerySet behaves differently from QuerySet

Reported by: rluedeman Owned by: nobody
Component: Database layer (models, ORM) Version: 1.3
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


I noticed a slight (but annoying) difference between slicing an EmptyQuerySet and slicing a standard QuerySet. It seems like slicing an EmptyQuerySet should return an EmptyQuerySet, rather than returning a list.


>> from django.contrib.auth.models import User
>> type(User.objects.all())
<class 'django.db.models.query.QuerySet'>
>> type(User.objects.all()[:0])
<class 'django.db.models.query.QuerySet'>
>> type(User.objects.all()[:10])
<class 'django.db.models.query.QuerySet'>
>> type(User.objects.none())
<class 'django.db.models.query.EmptyQuerySet'>
>> type(User.objects.none()[:0])
<type 'list'>
>> type(User.objects.none()[:10])
<type 'list'>

Change History (2)

comment:1 Changed 7 years ago by rluedeman

Component: UncategorizedDatabase layer (models, ORM)
Type: UncategorizedBug

comment:2 Changed 7 years ago by rluedeman

Resolution: duplicate
Status: newclosed

nevermind. just discovered this is a dupe of #10139

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