#12549: Native list method sort() does not work on ValuesListQuerySet instance
returned from value_list() QuerySet
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Reporter: jonathan_livni | Owner: nobody
Status: new | Milestone:
Component: Core framework | Version: 1.1-beta-1
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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'''The following code causes an exception:'''
{{{
members = Member.objects.all().values_list('name',flat=True)
members.sort(key=len,reverse=True) # Sorts members so that longer
strings are first
}}}
'''The exception is:'''
{{{
Traceback (most recent call last):
File "members_update.py", line 1179, in <module>
uploadMembers(trace,mems.members,configuration=conf)
File "/usr/lib/python2.5/site-packages/django/db/transaction.py",
line 265, in _commit_manually
return func(*args, **kw)
File "members_update.py", line 186, in uploadProducts
members.sort(key=len,reverse=True) # Sorts members so that longer
strings are first
AttributeError: 'ValuesListQuerySet' object has no attribute 'sort'
}}}
As far as the documentation goes, value_list() QuerySet was supposed to
return a List object, not a ValuesListQuerySet. The documentation
specifically states that value_list does is one of the functions not
returning a QuerySet. Even if there's some kind of need to to return a
List object, at least you would expect it to behave like a List object and
support its methods - such as sort()
--
Ticket URL: <http://code.djangoproject.com/ticket/12549>
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