Opened 8 years ago
Last modified 8 years ago
#26517 closed Bug
Empty Querset Using Empty Queryset in ExpressionWrapper — at Initial Version
| Reported by: | Sven R. Kunze | Owned by: | nobody |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | dev |
| Severity: | Normal | Keywords: | |
| Cc: | 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
We use the ExpressionWrapper + annotate to annotate specific boolean values to all queried instances like this (minimal working example):
editable_ones = ..... # another queryset result = MyModel.objects.annotate(editable=ExpressionWrapper(Q(pk__in=editable_child_folders), output_field=BooleanField())
As soon as editable_ones is empty, result is also empty. Reading the docs, I guess this is not desired behavior (https://docs.djangoproject.com/en/1.9/ref/models/querysets/#annotate).
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