#30942: first() and last() return same object (first in both cases) when the
order_by field is the same
-------------------------------------+-------------------------------------
Reporter: Tadas | Owner: nobody
Type: Bug | Status: new
Component: Database | Version: 2.2
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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from datetime import datetime
from django.db import models
class Foo(models.Model):
val = models.IntegerField()
created_time = models.DateTimeField()
created_time = datetime.now()
foo1, _ = Foo.objects.get_or_create(val=1,
defaults=dict(created_time=created_time))
foo2, _ = Foo.objects.get_or_create(val=2,
defaults=dict(created_time=created_time))
assert Foo.objects.count() == 2
foos = Foo.objects.all().order_by('created_time')
print(foos.first().val, foos.last().val) # prints -> 1 1
assert foo1.val == foos.first().val
assert foo2.val == foos.last().val # FAILS
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Ticket URL: <https://code.djangoproject.com/ticket/30942>
Django <https://code.djangoproject.com/>
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