#27331: Proposed opt_group argument for ModelChoiceField and
ModelMultipleChoiceField
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Reporter: Héctor Urbina | Owner: nobody
Type: New feature | Status: new
Component: Forms | Version: master
Severity: Normal | Keywords: ModelChoiceField optgroup
Triage Stage: Unreviewed | Has patch: 1
Easy pickings: 0 | UI/UX: 0
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Hello,
I've just implemented this and I thought It could well be incorporated
into Django itself; I guess it's a fairly common feature that one may need
on any project.
What I propose is to add a `opt_group` argument to ModelChoiceField and
ModelMultipleChoiceField; which indicates the item's field whose value is
used to group the choices. It should be used in conjunction with a
queryset which is (primarily) sorted by the same field.
Let me show with an example:
{{{
#!python
class Category(models.Model):
name = models.CharField(max_length=20)
class Item(models.Model):
name = models.CharField(max_length=20)
category = models.ForeignKey(Category)
}}}
And in some form's initialization process
{{{
#!python
field = ModelChoiceField(queryset=Item.objects.order_by('category__name',
'name'), opt_group='category')
}}}
field.choices will dynamically collect choices into named groups as a
2-tuple, which the underlying widget should present using an optgroup HTML
element.
--
Ticket URL: <https://code.djangoproject.com/ticket/27331>
Django <https://code.djangoproject.com/>
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