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