Hi,
I've been playing around with a field and widget for phone number having
two, prefix and subscriber, inputs. I've noticed some HTML attributes, such
as maxlength, which the widgets normally have, get lost in the
MultiValueField/MultiWidget interface. The MultiValueField contains two
parts - the fields and a MultiWidget. Each of the field has it's own widget
and provides it with custom attributes (the `Field.widget_attrs` method),
but this benefit gets lost, once they're wrapped into a MultiValueField,
because only it's own `widget_attrs` is used.
Is there a reason, why MultiValueField's MultiWidget's widgets are not
connected to the MultiValueField's fields' widgets? Can we provide such
link in order to benefit from existing HTML attributes' tweak's of
individual fields?
Minimal working example:
from django import forms
class PhoneWidget(forms.MultiWidget):
def __init__(self, widgets=(), attrs=None):
if not widgets:
widgets = (forms.TextInput({'class': 'number-prefix'}),
forms.TextInput({'class': 'subscriber'}))
super(PhoneWidget, self).__init__(widgets, attrs)
def decompress(self, value):
return (value or '').split('.', 1)
class PhoneField(forms.MultiValueField):
widget = PhoneWidget
def __init__(self, fields=(), *args, **kwargs):
fields = (forms.CharField(max_length=4), forms.CharField())
super(PhoneField, self).__init__(fields, *args, **kwargs)
def compress(self, data_list):
return '.'.join(data_list)
class PhoneForm(forms.Form):
number = PhoneField()
str(PhoneForm())
The prefix input in the resulting HTML lacks the "maxlength" attribute,
even though corresponding field have this limit defined.
Regards
Vlastimil
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