#18218: get_table_list in postgresql introspection is unordered
-------------------------------------+-------------------------------------
Reporter: claudep | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: SVN
(models, ORM) | Resolution:
Severity: Normal | Triage Stage: Accepted
Keywords: introspection | Needs documentation: 0
Has patch: 1 | Patch needs improvement: 0
Needs tests: 0 | UI/UX: 0
Easy pickings: 0 |
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Comment (by akaariai):
The patch does not work correctly on my Oracle setup. I get this error:
{{{
Traceback (most recent call last):
File
"/home/akaariai/Programming/django/tests/regressiontests/introspection/tests.py",
line 25, in _inner
return func(*args, **kwargs)
File
"/home/akaariai/Programming/django/tests/regressiontests/introspection/tests.py",
line 43, in test_table_names
self.assertEqual(tl, sorted(tl))
AssertionError: Lists differ: [u'auth_group', u'auth_group_p... !=
[u'auth_group', u'auth_group_p...
First differing element 7:
django_comments
django_comment_flags
[u'auth_group',
u'auth_group_permissions',
u'auth_permission',
u'auth_user',
u'auth_user_groups',
u'auth_user_user_permissions',
u'django_admin_log',
+ u'django_comment_flags',
u'django_comments',
- u'django_comment_flags',
u'django_content_type',
u'django_flatpage',
u'django_flatpage_sites',
u'django_ixn_test_table',
u'django_redirect',
u'django_session',
u'django_site',
u'inspectdb_digitsincolumnname',
u'inspectdb_message',
u'inspectdb_people',
u'inspectdb_peopledata',
u'inspectdb_peoplemoredata',
u'introspection_article',
u'introspection_reporter']
}}}
The reason for the error seems to be that Oracle sorts '_' and 's'
characters differently than Python. In general the sort order of the
database might be different than the sort order of Python. A good enough
fix for this case is to check just one pair of tables, hopefully a pair
which is incorrectly sorted without the patch, but correctly sorted with
the patch.
There are a couple of other Oracle tests failing already, but adding more
isn't a good way forward.
BTW In comment:1 I meant to say that the model order created by inspectdb
is altered (a positive side-effect), not that model creation order is
altered. I managed to write the wrong thing there...
--
Ticket URL: <https://code.djangoproject.com/ticket/18218#comment:3>
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