Opened 3 years ago
Closed 3 years ago
#33242 closed New feature (wontfix)
Support annotating related fields with QuerySet.annotate().
| Reported by: | rossm6 | Owned by: | nobody |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | 3.2 |
| Severity: | Normal | Keywords: | orm |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
I think it would be sensible to allow this -
m = Message.objects.annotate(room__something=Value('DOH', output_field=CharField())).select_related('room')
m.room.something == 'DOH' # is true
Perhaps the annotate API should accept a kwarg -
m = Message.objects.annotate(room__something=Value('DOH', output_field=CharField()), annotate_related=True).select_related('room')
m.room.something == 'DOH' # is true
https://stackoverflow.com/questions/69771898/is-there-a-way-to-annotate-a-related-field-in-django
Change History (1)
comment:1 by , 3 years ago
| Resolution: | → wontfix |
|---|---|
| Status: | new → closed |
| Summary: | Annotate a related field → Support annotating related fields with QuerySet.annotate(). |
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Thanks for the proposition.
QuerySet.annotate()annotates each object in theQuerySetwith the expression, so you can use.annotate(room_something=...)and refer it in the main object. IMO adding support for annotating related-objects would make the API unnecessarily complicated without any clear benefits.You can raise the idea on the DevelopersMailingList to reach a wider audience and see what other think.