#24692: QuerySet.extra(select=...) is silently dropped with aggregations
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Reporter: jdelic | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 1.8
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
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 jdelic):
Replying to [comment:4 timgraham]:
> Not that this fixes the problem, but we are trying to obsolete
`.extra()` by providing better APIs for all its use cases. Do you have a
use case in mind where the new expressions API doesn't suffice? If so, I
think there will be more interest in working on that instead of fixing
bugs with `.extra()` which seems likely to be deprecated at some point.
Well, there will always be edge cases where any ORM will not work, I
guess. In my case the new expressions API *would suffice*, unfortunately
we run a rather big project on Django 1.6.11, migrating to 1.7... so I
won't be able to use it for a while.
In any case, I ran into this while trying to generate some much more
complex reports from our database. As {{{.extra()}}} hasn't been
deprecated yet and I was able to boil it down to such a simple failure
case, I think fixing it would still be a very good idea. I feel that if
{{{.extra()}}} fails silently on such a simple case, there are bound to be
other "more legitimate" use-cases that will fail as well. That said, I
haven't investigated Django's code itself, so this might also just be a
very narrow failure mode.
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Ticket URL: <https://code.djangoproject.com/ticket/24692#comment:5>
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