Opened 10 years ago
Last modified 10 years ago
#23467 closed Bug
Inconsistent behavior when filtering by inherited models when using a proxy model — at Version 1
Reported by: | Luis A. Arce | Owned by: | nobody |
---|---|---|---|
Component: | Database layer (models, ORM) | Version: | 1.6 |
Severity: | Normal | Keywords: | inherit, proxy, model, queryset, filter |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description (last modified by )
Having the following scenario:
import django.db.models as db_models class ParentModel(db_models.Model): pass class ChildModel(ParentModel): pass class ParentProxyModel(ParentModel): pass class Meta: proxy=True
I can filter the ParentModel
in terms of existing inheriting children, but not ParentProxyModel
. An example:
Python 2.7.5 (default, Jun 25 2014, 10:19:55) [GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2 Type "help", "copyright", "credits" or "license" for more information. (InteractiveConsole) >>> a = ParentModel.objects.create() >>> b = ChildModel.objects.create() >>> ParentModel.objects.filter(childmodel=None) [<ParentModel: ParentModel object>] >>> ParentProxyModel.objects.filter(childmodel=None) Traceback (most recent call last): File "<console>", line 1, in <module> File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/manager.py", line 163, in filter return self.get_queryset().filter(*args, **kwargs) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/query.py", line 590, in filter return self._filter_or_exclude(False, *args, **kwargs) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/query.py", line 608, in _filter_or_exclude clone.query.add_q(Q(*args, **kwargs)) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1198, in add_q clause = self._add_q(where_part, used_aliases) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1234, in _add_q current_negated=current_negated) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1100, in build_filter allow_explicit_fk=True) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1357, in setup_joins names, opts, allow_many, allow_explicit_fk) File "/home/ajaest/Code/pfc/src/.env/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1277, in names_to_path "Choices are: %s" % (name, ", ".join(available))) FieldError: Cannot resolve keyword 'childmodel' into field. Choices are: id, parentmodel_ptr >>>
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