#23623: ModelChoiceField generates unused temporary cache
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Reporter: tchaumeny | Owner: nobody
Type: | Status: closed
Cleanup/optimization |
Component: Forms | Version: master
Severity: Normal | Resolution: fixed
Keywords: ModelChoiceField, | Triage Stage:
admin | Unreviewed
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 charettes):
It looks like this introduced a regression when passing a queryset using
the `prefetch_related()` which is not compatible with `iterator()` by
design #25496.
I would suggest we conditionally use `iterator()` if no related data
should be fetched instead of simply reverting this optimization.
Unfortunately there's no public API to determine whether or not a
`QuerySet` is prefetching data and we would have to rely on the
`qs._prefetch_related_lookups` property.
--
Ticket URL: <https://code.djangoproject.com/ticket/23623#comment:6>
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