#31683: Overridden methods ignored in models.DecimalField subclass
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Reporter: Max Rothman | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: 2.2
(models, ORM) |
Severity: Normal | Resolution: invalid
Keywords: custom-model-fields | 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 felixxm):
Replying to [comment:4 Max Rothman]:
> So as a django user the way I was supposed to find this out was to read
the source code?
Writing a custom model field is quite advanced usage. You can create a
subclass of `Field` and implement methods described in the How-to. If you
want to create a subclass of the builtin fields you can also implement all
methods or check an implementation and use relations between them. I don't
see any contradiction.
> The fact that this issue exists is proof that there is at least some
kind of documentation issue.
I don't see any issue here. If you want to raise an exception when
converting values to database values you should override
`get_db_prep_value()` as [https://docs.djangoproject.com/en/dev/howto
/custom-model-fields/#converting-query-values-to-database-values
documented].
--
Ticket URL: <https://code.djangoproject.com/ticket/31683#comment:5>
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