author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Sat, 24 Jan 2009 10:57:53 +0000 | |
changeset 946 | db4134853d64 |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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""" |
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South Africa-specific Form helpers |
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""" |
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Load ../vendor/django into trunk/app/django.
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from django.forms import ValidationError |
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from django.forms.fields import Field, RegexField, EMPTY_VALUES |
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from django.utils.checksums import luhn |
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from django.utils.translation import gettext as _ |
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import re |
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from datetime import date |
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|
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id_re = re.compile(r'^(?P<yy>\d\d)(?P<mm>\d\d)(?P<dd>\d\d)(?P<mid>\d{4})(?P<end>\d{3})') |
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|
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class ZAIDField(Field): |
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"""A form field for South African ID numbers -- the checksum is validated |
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using the Luhn checksum, and uses a simlistic (read: not entirely accurate) |
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check for the birthdate |
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""" |
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default_error_messages = { |
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'invalid': _(u'Enter a valid South African ID number'), |
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} |
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def clean(self, value): |
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# strip spaces and dashes |
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value = value.strip().replace(' ', '').replace('-', '') |
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|
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super(ZAIDField, self).clean(value) |
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|
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if value in EMPTY_VALUES: |
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return u'' |
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match = re.match(id_re, value) |
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|
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if not match: |
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raise ValidationError(self.error_messages['invalid']) |
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g = match.groupdict() |
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|
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try: |
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# The year 2000 is conveniently a leapyear. |
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# This algorithm will break in xx00 years which aren't leap years |
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# There is no way to guess the century of a ZA ID number |
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d = date(int(g['yy']) + 2000, int(g['mm']), int(g['dd'])) |
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except ValueError: |
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raise ValidationError(self.error_messages['invalid']) |
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|
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if not luhn(value): |
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raise ValidationError(self.error_messages['invalid']) |
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|
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return value |
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|
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class ZAPostCodeField(RegexField): |
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default_error_messages = { |
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'invalid': _(u'Enter a valid South African postal code'), |
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} |
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def __init__(self, *args, **kwargs): |
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super(ZAPostCodeField, self).__init__(r'^\d{4}$', |
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max_length=None, min_length=None) |