Re: CheckBoxInput widget: check_test

Forgo the most important part. I want to be prompted with a
checkboxes that show which categories are selected, as well as the
ones that aren't.

On Aug 6, 2:13 pm, lingrlongr <keith.ebe...@gmail.com> wrote:
> Having difficulty getting the check_test to work.  Can't find any
> examples out there that help.  I'll probably have to give a little
> background.  I simplified where able to...
>
> class Cat:
>   name = CharField
>
> class Category:
>   name = ForeignKey(Cat)
>   weight = DecimalField
>   item = ForeignKey('Item')
>
> class Item:
>   name = CharField
>
> Basically Cat is a model of all categories and Category is a model of
> which Cat's are assigned to an item.  I did it this way because I want
> to have a "master list" of categories, then have the mapping done in
> other models.
>
> So now I want to build a form at run-time.
>
> def get_form(item):
>   fields = dict()
>   cat_choices = [(c.id, c.name) for c in Cat.objects.all()]
>   for c in cat_choices:
>     id, name = c
>     checked = bool(item.categoty_set.filter(pk=id).count())
>
>     fields['item_cat_%d' % id] = forms.ChoiceField(
>       label = name,
>       required = False,
>       choices = cat_choices,
>       widget = forms.CheckboxInput(
>         attrs={'value': checked},
>         check_test = lambda a: a == checked
>       )
>     )
>     return type('CatSelectForm', (forms.BaseForm,), {'base_fields':
> fields})
>
> So how can I get the correct checkboxes checked at runtime when the
> template is rendered?
>
> Thx.

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