#14029: not operator on F objects silently fails
------------------------------------------+---------------------------------
Reporter: ramiro | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: 1.2
Keywords: | Stage: Unreviewed
Has_patch: 0 |
------------------------------------------+---------------------------------
[On behalf of MatÃas Bellone aka toote that got his submission rejected as
SPAM]
Trying to make a toggle action in the admin on a !BooleanField lead me to
very simple and straightforward code inside the !ModelAdmin subclass.
Problem is that it didn't work and no error was presented whatsoever. Even
worse, the update actually executes something that modifies the queryset
but I haven't found a way to identify how to get the query executed.
The model can be just as simple as:
{{{
from django.db.models import Model, BooleanField
class TestModel(Model):
field1 = BooleanField()
}}}
Testing the "action" in an interactive shell has the same results:
{{{
$ ./manage.py shell
Python 2.6.5+ (release26-maint, Jul 6 2010, 12:58:20)
[GCC 4.4.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from models import TestModel
>>> a = TestModel.objects.all()
>>> for instance in a:
... print instance.field1
...
True
True
>>> from django.db.models import F
>>> a = TestModel.objects.all()
>>> # to return to having a non-executed queryset
>>> a.update(field1=not F('field1'))
2
>>> a = TestModel.objects.all()
>>> for instance in a:
... print instance.field1
...
True
True
}}}
Further tests with the debug_toolbar shows that no matter what the
original values of field1 is the update will set it to true (tested on
querysets with 1 and 2 instances with all possible combinations of field1
values).
--
Ticket URL: <http://code.djangoproject.com/ticket/14029>
Django <http://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/django-updates?hl=en.
