#33772: Queryset first() returns different result than queryset[0] when using
ExpressionWrapper
-------------------------------------+-------------------------------------
Reporter: Pablo Pissi | Owner: nobody
Type: | Status: new
Cleanup/optimization |
Component: Database layer | Version: 3.2
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
ExpressionWrapper,first,queryset |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Carlton Gibson):
* status: closed => new
* type: Uncategorized => Cleanup/optimization
* resolution: needsinfo =>
* stage: Unreviewed => Accepted
Comment:
Thanks both. Good.
> Thoughts on the value of such adjustment Carlton?
We do see tickets periodically running into this problem: I recall a
number of occasions seeing links to that same docs section.
I guess for every one that we see there are several/many in the wild we
don't
The `first()` docs link to the ''Interaction with order_by()'' section
there, presumably to try to forestall this confusion, but I still get the
impression it's one of the more subtle points of the ORM behaviour, so if
we can provide a better error message to point folks in the right
direction that's likely a win. 🤔
I'll provisionally accept on that basis. (Mariusz can object on review if
he doesn't like it 😃)
Pablo would you like to work on a PR based on Simon's suggestion?
--
Ticket URL: <https://code.djangoproject.com/ticket/33772#comment:6>
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