#35843: Changing the rendering order of formsets is not clear
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Reporter: Matthew Pava | Type:
| Cleanup/optimization
Status: new | Component:
| Documentation
Version: 5.1 | Severity: Normal
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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I have a formset that I'd like to modify the order of the forms in. I did
overwrite the `forms` `cached_property` with a simple sorted addition to
the base `forms` `cached_property`, but I soon discovered that data wasn't
saving properly in some cases.
Apparently, I went about it all wrong. There's this little tiny tidbit
here about rendering forms:
[https://docs.djangoproject.com/en/5.1/topics/forms/formsets/#:~:text=Iterating%20over%20a%20formset%20will,which%20returns%20the%20corresponding%20form]
{{{
Iterating over a formset will render the forms in the order they were
created. You can change this order by providing an alternate
implementation for the __iter__() method.
Formsets can also be indexed into, which returns the corresponding form.
If you override __iter__, you will need to also override __getitem__ to
have matching behavior.
}}}
Okay, but I've never implemented an `__iter__` method, and based on what
I've read, you also have to implement a `__next__` method. And you
explicitly tell me to implement the `__getitem__` method. I understand if
you don't want to make changing the rendering ordering easier to implement
in Django; however, I would appreciate more and better documentation
including an example of how exactly to implement any of these methods to
change the rendering order of a formset.
--
Ticket URL: <https://code.djangoproject.com/ticket/35843>
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