#34024: 'WhereNode' object has no attribute 'is_summary' when counting a
queryset
with annotation from a subquery
-------------------------------------+-------------------------------------
Reporter: Valentin Rigal | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 4.1
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by David Sanders):
Confirmed on latest main.
Full traceback from ipython:
{{{
[ins] In [1]: School.objects.annotate(
...:
speciality=Subquery(Director.objects.values('speciality')[:1]),
...: has_speciality=Q(speciality__isnull=False)
...: ).count()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
Cell In [1], line 4
1 School.objects.annotate(
2
speciality=Subquery(Director.objects.values('speciality')[:1]),
3 has_speciality=Q(speciality__isnull=False)
----> 4 ).count()
File ~/projects/django/django/db/models/query.py:621, in
QuerySet.count(self)
618 if self._result_cache is not None:
619 return len(self._result_cache)
--> 621 return self.query.get_count(using=self.db)
File ~/projects/django/django/db/models/sql/query.py:554, in
Query.get_count(self, using)
552 obj = self.clone()
553 obj.add_annotation(Count("*"), alias="__count", is_summary=True)
--> 554 return obj.get_aggregation(using, ["__count"])["__count"]
File ~/projects/django/django/db/models/sql/query.py:503, in
Query.get_aggregation(self, using, added_aggregate_names)
501 for alias, expression in
list(inner_query.annotation_select.items()):
502 annotation_select_mask = inner_query.annotation_select_mask
--> 503 if expression.is_summary:
504 expression, col_cnt = inner_query.rewrite_cols(expression,
col_cnt)
505 outer_query.annotations[alias] =
expression.relabeled_clone(
506 relabels
507 )
AttributeError: 'WhereNode' object has no attribute 'is_summary'
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/34024#comment:1>
Django <https://code.djangoproject.com/>
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