#31943: Queryset with values()/values_list() crashes when recreated from a
pickled
query.
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Reporter: Beda Kosata | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 2.2
(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
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Comment (by Simon Charette):
Is there any reason you can't pickle the queryset object itself instead of
`queryset.query`?
It feels like pickling of `QuerySet.query` and reassignment to an
independently created `QuerySet` instance is asking for trouble. It's not
a tested or documented pattern AFAIK.
The `QuerySet` abstraction manages resultset caching, prefetching and
iteration while `Query` abstraction deals with SQL compilation and
execution. If you want to ''pickle'' an object that can be used for later
iteration I'd say you should pickle `QuerySet` instead or `Query`.
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Ticket URL: <https://code.djangoproject.com/ticket/31943#comment:3>
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