#30124: QuerySet.only() on reverse many-to-one relationship causes extra
database
queries
-------------------------------------+-------------------------------------
Reporter: Beda Kosata | Owner: Dan Davis
Type: Bug | Status: assigned
Component: Database layer | Version: 2.1
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Dan Davis):
New idea - in the case of a select_related(), then the natural expectation
is that only will also apply to fields in the related model. To finish
this, I will need to understand better how the select tuple in
`django.db.models.sql.query.Query` is populated, and when. I know it is
deferred to the end. I will check.
--
Ticket URL: <https://code.djangoproject.com/ticket/30124#comment:5>
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