#17668: prefetch_related does not work in in_bulk
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Reporter: gurets@… | Owner: nobody
Type: Uncategorized | Status: new
Component: Database layer | Version:
(models, ORM) | 1.4-alpha-1
Severity: Normal | Resolution:
Keywords: prefetch_related, | Triage Stage: Accepted
in_bulk | Needs documentation: 0
Has patch: 0 | Patch needs improvement: 0
Needs tests: 0 | UI/UX: 0
Easy pickings: 0 |
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Changes (by akaariai):
* cc: anssi.kaariainen@… (added)
* needs_better_patch: => 0
* needs_docs: => 0
* needs_tests: => 0
* stage: Unreviewed => Accepted
Comment:
The problem is anything using the .iterator() of qs will not do the
prefetching. This should be documented, as there is no possibility to both
yield object at a time, and do prefetching. Maybe also an assert in the
iterator about this would be warranted. Another option is to force the
whole query to be iterated over and then doing the prefetch when calling
.iterator() and using .prefetch_related() in the same query.
Marking as accepted. Maybe this should be a release blocker?
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Ticket URL: <https://code.djangoproject.com/ticket/17668#comment:1>
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