#2316: GenericRelation and get_or_create do not work together
-------------------------------------+--------------------------------------
Reporter: Rudolph | Owner: adrian
Status: reopened | Milestone:
Component: Core framework | Version: 1.1
Resolution: | Keywords: GenericRelation
Stage: Accepted | Has_patch: 1
Needs_docs: 0 | Needs_tests: 1
Needs_better_patch: 0 |
-------------------------------------+--------------------------------------
Changes (by wam):
* status: closed => reopened
* version: SVN => 1.1
* resolution: duplicate =>
Comment:
This bug is neither a duplicate nor has it been fixed. Using Django 1.1.1,
the issue still persists, as demonstrated by:
{{{
# Model definition for app ticket2316 demonstrating bug #2316
from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import generic
class SomeObject(models.Model):
test_content_type = models.ForeignKey(ContentType, null=True,
blank=True)
test_object_id = models.PositiveIntegerField(null=True, blank=True)
test_object = generic.GenericForeignKey('test_content_type',
'test_object_id')
}}}
After the customary syncdb, etc:
{{{
>>> from ticket2316.models import SomeObject
>>> from django.contrib.auth.models import User
>>> User.objects.all()[0]
<User: wam>
>>> user = _
>>> SomeObject(test_object=user)
<SomeObject: SomeObject object>
>>> SomeObject.objects.get_or_create(test_object=user)
------------------------------------------------------------
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/manager.py", line 123, in
get_or_create
return self.get_query_set().get_or_create(**kwargs)
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/query.py", line 328, in
get_or_create
return self.get(**kwargs), False
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/query.py", line 299, in
get
clone = self.filter(*args, **kwargs)
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/query.py", line 498, in
filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/query.py", line 516, in
_filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/sql/query.py", line 1675,
in add_q
can_reuse=used_aliases)
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/sql/query.py", line 1569,
in add_filter
negate=negate, process_extras=process_extras)
File "/home/wam/projs/virtualenvs/demo/lib/python2.6/site-
packages/Django-1.1.1-py2.6.egg/django/db/models/sql/query.py", line 1737,
in setup_joins
"Choices are: %s" % (name, ", ".join(names)))
<class 'django.core.exceptions.FieldError'>: Cannot resolve keyword
'test_object' into field. Choices are: id, test_content_type,
test_object_id
}}}
I'll try and work up a more formal unittest in the near future.
P.S. I don't exactly know how I should change the properties, considering
this ticket has remained dormant for the past two years. I considered
filing a new ticket, but the problem is *exactly* the failure condition
this ticket was originally opened to address, it just appears the ticket
got diverted onto a tangent with a similar, but not identical ticket that
the original poster may have been experiencing as well.
--
Ticket URL: <http://code.djangoproject.com/ticket/2316#comment:7>
Django <http://code.djangoproject.com/>
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