54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
"""
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UK-specific Form helpers
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"""
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import re
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from django.newforms.fields import CharField, Select
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from django.newforms import ValidationError
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from django.utils.translation import ugettext_lazy as _
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class UKPostcodeField(CharField):
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"""
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A form field that validates its input is a UK postcode.
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The regular expression used is sourced from the schema for British Standard
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BS7666 address types: http://www.govtalk.gov.uk/gdsc/schemas/bs7666-v2-0.xsd
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The value is uppercased and a space added in the correct place, if required.
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"""
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default_error_messages = {
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'invalid': _(u'Enter a valid postcode.'),
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}
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outcode_pattern = '[A-PR-UWYZ]([0-9]{1,2}|([A-HIK-Y][0-9](|[0-9]|[ABEHMNPRVWXY]))|[0-9][A-HJKSTUW])'
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incode_pattern = '[0-9][ABD-HJLNP-UW-Z]{2}'
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postcode_regex = re.compile(r'^(GIR 0AA|%s %s)$' % (outcode_pattern, incode_pattern))
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space_regex = re.compile(r' *(%s)$' % incode_pattern)
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def clean(self, value):
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value = super(UKPostcodeField, self).clean(value)
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if value == u'':
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return value
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postcode = value.upper().strip()
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# Put a single space before the incode (second part).
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postcode = self.space_regex.sub(r' \1', postcode)
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if not self.postcode_regex.search(postcode):
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raise ValidationError(self.default_error_messages['invalid'])
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return postcode
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class UKCountySelect(Select):
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"""
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A Select widget that uses a list of UK Counties/Regions as its choices.
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"""
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def __init__(self, attrs=None):
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from uk_regions import UK_REGION_CHOICES
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super(UKCountySelect, self).__init__(attrs, choices=UK_REGION_CHOICES)
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class UKNationSelect(Select):
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"""
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A Select widget that uses a list of UK Nations as its choices.
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"""
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def __init__(self, attrs=None):
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from uk_regions import UK_NATIONS_CHOICES
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super(UKNationSelect, self).__init__(attrs, choices=UK_NATIONS_CHOICES)
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