Disclaimer - I have never done this before!
>From what I see I reckon you will need to create both a custom field and a
custom widget!
I think so because if you have TextInputs validation may fail on the
ModelMultipleChoiceField?
I would think you need to override the methods: __init__, clean, to_python
and compress.
I think you will also need to create a more customized widget inheriting
directly from MultiWidget?
I think you would need to override the methods: __init__, render, decompress
But I'm no expert ;-(
On Sun, Aug 26, 2012 at 7:42 PM, Nicolas Emiliani <or3s...@gmail.com> wrote:
> Hi,
>
> I've been struggling with this for the past two weeks, and i think it's
> time to ask.
>
> I have and admin form that has a ModelMultipleChoiceField that is used to
> display
> a ManyToMany model field that specifies a through model
>
> class Person(models.Model):
> name = models.CharField(max_length=10)
> attributes = models.ManyToManyField('Attribute',through='Has',
> blank=True, null=True)
>
> class Has(models.Model):
> person = models.ForeignKey('Person')
> attribute = models.ForeignKey('Attribute')
> value = models.CharField(max_length=10)
>
>
> class Attribute(models.Model):
> name = models.CharField(max_length=10)
> atype = models.CharField(max_length=2,
> choices=(('TF','true/false'),
> ('IN','text')))
>
>
> class PersonAdminForm(forms.ModelForm):
>
> class Meta:
> model = Person
>
> attrs = forms.ModelMultipleChoiceField( \
> label='Attributes',
> queryset=Attribute.objects.all(),
> widget=forms.CheckboxSelectMultiple(),
> )
>
>
> This CheckboxSelectMultiple works fine, but I want to be able to render
> each relation according to the Attribute.atype value, meaning if it is TF,
> then tender it as a CheckBox, if it is IN the render it as an InputText
>
> I inherited from CheckboxSelectMultiple so it does that, but then when I'm
> on the admin form and for one specific attribute of type IN, rendered as a
> TextInput, I set a value (let's say 500) and then press save , the method
>
> SelectMultiple.value_from_datadict gets called and passed as data :
>
> <QueryDict: {u'csrfmiddlewaretoken':
> [u'GWLnuoTSTjjLmpYOizodBA4VA1FmwdQw'],
> u'_continue': [u'Save and continue editing'], u'name': [u'nico'],
> u'attrs': [ u'2']}>
>
> And this is what has been driving me nuts!
>
> u'attrs': [ u'2'],
>
> As you can see it only passes the id of the attribute, not the id and the
> value. What I
> need is something like
>
> u'attrs': [ (u'2','500')],
>
> Any ideas on how to fix this ?
>
> Thanks!
>
> --
> Nicolas Emiliani
>
> Lo unico instantaneo en la vida es el cafe, y es bien feo.
>
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