あなたは基本的に必要ですMultiValueField
django-creditcard appからの実装例を次に示します。
class ExpiryDateField(forms.MultiValueField):
"""
Form field that validates credit card expiry dates.
"""
default_error_messages = {
'invalid_month': _(u'Please enter a valid month.'),
'invalid_year': _(u'Please enter a valid year.'),
'date_passed': _(u'This expiry date has passed.'),
}
def __init__(self, *args, **kwargs):
today = date.today()
error_messages = self.default_error_messages.copy()
if 'error_messages' in kwargs:
error_messages.update(kwargs['error_messages'])
if 'initial' not in kwargs:
# Set default expiry date based on current month and year
kwargs['initial'] = today
months = [(x, '%02d (%s)' % (x, date(2000, x, 1).strftime(MONTH_FORMAT))) for x in xrange(1, 13)]
years = [(x, x) for x in xrange(today.year, today.year + 15)]
fields = (
forms.ChoiceField(choices=months, error_messages={'invalid': error_messages['invalid_month']}),
forms.ChoiceField(choices=years, error_messages={'invalid': error_messages['invalid_year']}),
)
super(ExpiryDateField, self).__init__(fields, *args, **kwargs)
self.widget = ExpiryDateWidget(widgets=[fields[0].widget, fields[1].widget])
def clean(self, value):
expiry_date = super(ExpiryDateField, self).clean(value)
if date.today() > expiry_date:
raise forms.ValidationError(self.error_messages['date_passed'])
return expiry_date
def compress(self, data_list):
if data_list:
try:
month = int(data_list[0])
except (ValueError, TypeError):
raise forms.ValidationError(self.error_messages['invalid_month'])
try:
year = int(data_list[1])
except (ValueError, TypeError):
raise forms.ValidationError(self.error_messages['invalid_year'])
try:
day = monthrange(year, month)[1] # last day of the month
except IllegalMonthError:
raise forms.ValidationError(self.error_messages['invalid_month'])
except ValueError:
raise forms.ValidationError(self.error_messages['invalid_year'])
return date(year, month, day)
return None