#10064: error: annotate doesn't support select_related
--------------------------------------+-------------------------------------
Reporter: olivius | Owner:
Status: new | Milestone: post-1.0
Component: ORM aggregation | Version: SVN
Resolution: | Keywords: annotate
Stage: Unreviewed | Has_patch: 0
Needs_docs: 0 | Needs_tests: 0
Needs_better_patch: 0 |
--------------------------------------+-------------------------------------
Old description:
> {{{
> models.py:[[BR]]
>
> class Account(models.Model):
> accountname = models.CharField(max_length=20)
> account_creator = models.ForeignKey(User)
> description = models.TextField(_('description'), blank=True)
>
> def __unicode__(self):
> return self.account
>
> class Category(models.Model):
> category_name = models.CharField(max_length=50)
> category_creator = models.ForeignKey(User)
> description = models.TextField(_('description'), blank=True)
> def __unicode__(self):
> return self.category
>
> class Transaction(models.Model):
> category = models.ForeignKey(Category)
> account_from = models.ForeignKey(Account,
> related_name='account_from')
> account_to = models.ForeignKey(Account,
> related_name='account_to')
> creator = models.ForeignKey(User)
> label = models.CharField(_('label'), max_length=30)
> description = models.TextField(_('description'), blank=True)
> ammount = models.DecimalField(_('amount'),max_digits=8,
> decimal_places=2)
> created_at = models.DateTimeField(_('created at'),
> default=datetime.now)
> updated_at = models.DateTimeField(_('updated at'))
>
> def __unicode__(self):
> return self.label
> }}}
>
> shell:[[BR]]
>
> '''transactions=Transaction.objects.select_related('category','account_from','account_to').annotate(Sum('amount')).order_by('category','updated_at')'''
>
> '''print transactions'''
>
> Traceback (most recent call last):
> File "<console>", line 1, in <module>
> File "C:\Python25\lib\site-packages\django\db\models\query.py", line
> 239, in _
> _getitem__
> return list(qs)[0]
> File "C:\Python25\lib\site-packages\django\db\models\query.py", line
> 163, in _
> _len__
> self._result_cache.extend(list(self._iter))
> File "C:\Python25\lib\site-packages\django\db\models\query.py", line
> 294, in i
> terator
> setattr(obj, aggregate, row[i+aggregate_start])
> IndexError: tuple index out of range
New description:
models.py:[[BR]]
{{{
class Account(models.Model):
accountname = models.CharField(max_length=20)
account_creator = models.ForeignKey(User)
description = models.TextField(_('description'), blank=True)
def __unicode__(self):
return self.account
class Category(models.Model):
category_name = models.CharField(max_length=50)
category_creator = models.ForeignKey(User)
description = models.TextField(_('description'), blank=True)
def __unicode__(self):
return self.category
class Transaction(models.Model):
category = models.ForeignKey(Category)
account_from = models.ForeignKey(Account,
related_name='account_from')
account_to = models.ForeignKey(Account,
related_name='account_to')
creator = models.ForeignKey(User)
label = models.CharField(_('label'), max_length=30)
description = models.TextField(_('description'), blank=True)
ammount = models.DecimalField(_('amount'),max_digits=8,
decimal_places=2)
created_at = models.DateTimeField(_('created at'),
default=datetime.now)
updated_at = models.DateTimeField(_('updated at'))
def __unicode__(self):
return self.label
}}}
shell:[[BR]]
'''transactions=Transaction.objects.select_related('category','account_from','account_to').annotate(Sum('amount')).order_by('category','updated_at')'''
'''print transactions'''
{{{
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\Python25\lib\site-packages\django\db\models\query.py", line
239, in __getitem__
return list(qs)[0]
File "C:\Python25\lib\site-packages\django\db\models\query.py", line
163, in __len__
self._result_cache.extend(list(self._iter))
File "C:\Python25\lib\site-packages\django\db\models\query.py", line
294, in iterator
setattr(obj, aggregate, row[i+aggregate_start])
IndexError: tuple index out of range
}}}
Comment (by kmtracey):
(Fixed formatting.)
--
Ticket URL: <http://code.djangoproject.com/ticket/10064#comment:2>
Django <http://code.djangoproject.com/>
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