Opened 2 years ago

Last modified 2 years ago

#34016 closed Bug

QuerySet.values_list crash when using ArrayAgg — at Initial Version

Reported by: Alex Kerkum Owned by:
Component: contrib.postgres Version: 4.1
Severity: Release blocker Keywords:
Cc: Simon Charette Triage Stage: Ready for checkin
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

Using ArrayAgg in combination with values_list results in 'TypeError: Complex expressions require an alias'.

For example:

from django.contrib.postgres.aggregates import ArrayAgg
SampleUser.objects.values_list(ArrayAgg("post_id"))

File django/db/models/aggregates.py:98, in Aggregate.default_alias(self)
     96 if len(expressions) == 1 and hasattr(expressions[0], "name"):
     97     return "%s__%s" % (expressions[0].name, self.name.lower())
---> 98 raise TypeError("Complex expressions require an alias")

TypeError: Complex expressions require an alias

The expressions variable here seems to contain [F(post_id), OrderByList()] causing the len[expressions] check to fail. That's as far as I got.

This still worked in 4.0.7.

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