#35235: ArrayAgg() doesn't return default when filter contains __in=[]. ----------------------------------+-------------------------------------- Reporter: Per Carlsen | Owner: Sharon Woo Type: Bug | Status: assigned Component: contrib.postgres | Version: 5.0 Severity: Normal | Resolution: Keywords: ArrayAgg | Triage Stage: Accepted Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 ----------------------------------+-------------------------------------- Changes (by Mariusz Felisiak):
* cc: Simon Charette, Nick Pope (added) * stage: Unreviewed => Accepted * summary: ArrayAgg inconsistent return value when no results => ArrayAgg() doesn't return default when filter contains __in=[]. Comment: I was able to reproduce the issue with a small models: {{{#!python class MyModel(models.Model): pass class MyOtherModel(models.Model): mymodel = models.ForeignKey(MyModel, models.CASCADE) for filter_value in ([], [-1]): for default in ([], Value([])): result = MyModel.objects.annotate( annotated_ids=ArrayAgg( "myothermodel__id", filter=Q( myothermodel__id__in=filter_value, ), default=Value([]), ) ).first().annotated_ids print(result, filter_value, default) }}} results {{{ {} [] [] {} [] Value([]) [] [-1] [] [] [-1] Value([]) }}} -- Ticket URL: <https://code.djangoproject.com/ticket/35235#comment:3> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/0107018dc5acf92d-daa82adf-4aaf-4cd3-a253-fc61142d9a73-000000%40eu-central-1.amazonses.com.