Source code for localflavor.is_.forms

"""Iceland specific form helpers."""
from django.forms import ValidationError
from django.forms.fields import RegexField
from django.forms.widgets import Select
from django.utils.encoding import force_str
from django.utils.translation import gettext_lazy as _

from .is_postalcodes import IS_POSTALCODES

[docs]class ISIdNumberField(RegexField): """ Icelandic identification number (kennitala). This is a number every citizen of Iceland has. """ default_error_messages = { 'invalid': _('Enter a valid Icelandic identification number. The format is XXXXXX-XXXX.'), 'checksum': _('The Icelandic identification number is not valid.'), } def __init__(self, max_length=11, min_length=10, **kwargs): super().__init__( r'^\d{6}(-| )?\d{4}$', max_length=max_length, min_length=min_length, **kwargs )
[docs] def clean(self, value): value = super().clean(value) if value in self.empty_values: return value value = self._canonify(value) if self._validate(value): return self._format(value) else: raise ValidationError(self.error_messages['checksum'], code='checksum')
def _canonify(self, value): """Returns the value as only digits.""" return value.replace('-', '').replace(' ', '') def _validate(self, value): """ Takes in the value in canonical form and checks the verifier digit. The method is modulo 11. """ check = [3, 2, 7, 6, 5, 4, 3, 2, 1, 0] return sum([int(value[i]) * check[i] for i in range(10)]) % 11 == 0 def _format(self, value): """Takes in the value in canonical form and returns it in the common display format.""" return force_str(value[:6] + '-' + value[6:])
[docs]class ISPostalCodeSelect(Select): """A Select widget that uses a list of Icelandic postal codes as its choices.""" def __init__(self, attrs=None): super().__init__(attrs, choices=IS_POSTALCODES)