#30564: Cannot create custom field that returns a queryset AND uses pre_save().
-------------------------------------+-------------------------------------
Reporter: Dan J Strohl | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution: invalid
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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Changes (by felixxm):
* status: new => closed
* version: 2.2 => master
* resolution: => invalid
Comment:
Thanks for the report, however it is not an issue in Django. It seems that
you want to get help with your custom implementation.
If you're on PostgreSQL you can use
[https://docs.djangoproject.com/en/2.2/ref/contrib/postgres/fields/#arrayfield
ArrayField] without implementing a custom field. If you're on a different
database and you need to implement a custom field for that, then please
use one of
[https://code.djangoproject.com/wiki/TicketClosingReasons/UseSupportChannels
support channels].
`if hasattr(value, 'resolve_expression')` is the way that we prefer to
check if something is an expression, it is used in many places.
Closing per TicketClosingReasons/UseSupportChannels.
--
Ticket URL: <https://code.djangoproject.com/ticket/30564#comment:2>
Django <https://code.djangoproject.com/>
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