#11936: Proxy models' names are too long for django.contrib.auth which causes
weird
test failures
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Reporter: ryszard | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: 1.1
Keywords: test, only, deferred fields | Stage: Unreviewed
Has_patch: 0 |
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When you call `SomeModel.objects.only('somefield')`, then the generated
deferred proxy model class name may be too long for
django.contrib.auth.models.Permission, resulting in DB warnings which are
raised as an exception.
This manifests itself if you use `only` in your tests cases. The just
created proxy model will still be floating among the normal models and
contrib.auth.management.create_permissions will try to create Permission
objects, resulting in queries like
INSERT INTO `auth_permission` (`name`, `content_type_id`, `codename`)
VALUES (Can add episode_
deferred_air_date_art_large_art_medium_art_small_created_description_duration_free_available_free_channel_free_video_url_info_modified_number_parental_rating_released_season_streaming_available_subscription_id,
19,
add_episode_deferred_air_date_art_large_art_medium_art_small_created_description_duration_free_available_free_channel_free_video_url_info_modified_number_parental_rating_released_season_streaming_available_subscription_id)
which will cause the NEXT test case to fail.
I was able to reproduce this on Linux, with Python 2.6, MySQL_python
1.2.3c1 and MySQL 5.0.51a (it may depend on how django reacts to MySQL
warnings). I will attach a models.py and tests.py that allow to reproduce
this bug.
Potential solutions: django.db.models.get_models should not return proxies
for deferred models, the deferred proxy models should have shorter names
or their type some custom __repr__.
--
Ticket URL: <http://code.djangoproject.com/ticket/11936>
Django <http://code.djangoproject.com/>
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