#4284: forms containing MultiWidgets cannot be reconstructed with clean_data
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Reporter: [EMAIL PROTECTED] | Owner: adrian
Status: new | Component: django.newforms
Version: SVN | Keywords: MultiValueField MultiWidget
clean_data decompress
Stage: Unreviewed | Has_patch: 0
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This seems to be a design issue that may not be easy to resolve, but there
is no easy way to reconstruct a MultiValueField with its own clean data.
Whereas a normal field will accept data from clean_data, a MultiValueField
expects it to be 'decompressed' first.
{{{
>>> from datetime import *
>>> from django.newforms import *
>>>
>>> class MonthYearWidget(MultiWidget):
... def __init__(self,months=(),years=(),attrs=None):
... widgets = (Select(choices=months),Select(choices=years))
... super(MonthYearWidget,self).__init__(widgets,attrs)
... def decompress(self,value):
... if value:
... return value.split('/')
... return ['', '']
...
>>> class MonthYearField(MultiValueField):
... def
__init__(self,months=(),years=(),required=True,widget=None,label=None,initial=None):
... fields = (ChoiceField(choices=months),ChoiceField(choices=years))
... widget = MonthYearWidget(months=months,years=years)
...
super(MonthYearField,self).__init__(fields,required,widget,label,initial)
... def compress(self,data_list):
... if data_list:
... return '/'.join(data_list)
... return None
...
>>> month_list = [x + 1 for x in xrange(12)]
>>> months = [(m,m) for m in month_list]
>>> year_list = [(date.today() + timedelta(days=366)*x).strftime("%Y") for
x in xrange(10)]
>>> years = [(y,y) for y in year_list]
>>>
>>> class PaymentForm(Form):
... ccn = RegexField('^\d{4}[ .-]?\d{4}[ .-]?\d{4}[
.-]?\d{4}$',widget=TextInput(attrs={'maxlength':19,'size':19}))
... exp_date = MonthYearField(months=months,years=years)
...
>>> POST = {'ccn':'1234 5678 9012
3456','exp_date_0':'5','exp_date_1':'2007'}
>>> pf = PaymentForm(POST)
>>> pf.is_valid()
True
>>> pf.clean_data
{'ccn': u'1234 5678 9012 3456', 'exp_date': u'5/2007'}
>>> pf1 = PaymentForm(pf.clean_data)
>>> pf1.is_valid()
False
>>> pf1.errors
{'exp_date': [u'This field is required.']}
}}}
--
Ticket URL: <http://code.djangoproject.com/ticket/4284>
Django Code <http://code.djangoproject.com/>
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