def process_formdata(self, valuelist):
super(RadarCHINoField, self).process_formdata(valuelist)
if self.data and not validate_nhs_no(self.data):
raise ValueError("Not a valid CHI number.")
def _nhs_no(value, number_type):
if not validate_nhs_no(value):
raise ValidationError('Not a valid %s number.' % number_type)
