#26379: Document that first filter() chained to a RelatedManager is sticky
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Reporter: Balázs Oroszi | Owner: Annabelle
| Wiegart
Type: Bug | Status: assigned
Component: Documentation | Version: 1.9
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Annabelle Wiegart):
I just submitted a PR: https://github.com/django/django/pull/20085,
looking forward to some feedback.
I tried to explain the sticky filter behaviour without getting into too
much SQL details. I was hesitant whether to include some sort of
justification for the unexpected behaviour - like, if we want strict
filter behaviour to be available in other places like one-to-many
relationships (and we do), this is the trade-off. Something like "this is
currently a limitation of the ORM". For the moment, I decided against
including such a statement in order not to confuse people who are just
checking documentation in order to get the desired queryset. Not everyone
needs to understand the details of what is going on behind the scenes.
That being said, let me know if you think more explanation is needed.
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Ticket URL: <https://code.djangoproject.com/ticket/26379#comment:20>
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