#14754: TypeError: '[some aggregate function]' object does not support indexing
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Reporter: master | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: SVN
Keywords: relabel_aliases, aggregate | Stage: Unreviewed
Has_patch: 1 |
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Relabelling aliases on the query value, when this value is an Aggregate
object, is expected.
A simplified example (don't look for a sense, it's just for the demo):
{{{
from django.contrib.auth.models import User
emails = User.objects.values('email').annotate(
cnt=Count('id'),
some_int=Count('username')
).filter(some_int=F('cnt')).values_list('email', flat=True)
print User.objects.filter(email__in=emails).query
}}}
produces:
{{{
File "D:\Python26\lib\site-packages\django-
svn\django\db\models\sql\query.py", line 709, in change_aliases
self.having.relabel_aliases(change_map)
File "D:\Python26\lib\site-packages\django-
svn\django\db\models\sql\where.py", line 251, in relabel_aliases
child[3].relabel_aliases(change_map)
File "D:\Python26\lib\site-packages\django-
svn\django\db\models\sql\expressions.py", line 22, in relabel_aliases
self.cols[node] = (change_map.get(col[0], col[0]), col[1])
TypeError: 'Count' object does not support indexing
}}}
A patch is provided, for django\db\models\sql\expressions.py
--
Ticket URL: <http://code.djangoproject.com/ticket/14754>
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