Django Forms ChoiceField Snippets

gistfile1.txt

class SearchForm(SearchForm):

    city = forms.ChoiceField(required=False)
    province = forms.ChoiceField(required=False)

    def __init__(self, *args, **kwargs):
      # DEMO: to get list of fields w/ changed data
      # example: check if city choice data has changed
      if 'city' in self.changed_data:
          self.fields['city'].widget.attrs['class'] = 'show'
      
      # DEMO: to get the value of a choice field
      # example: get the value of city choice field
      for name, field in self.fields.items():
          if name is 'city':
              prefixed_name = self.add_prefix(name)
              data_value = field.widget.value_from_datadict(self.data, self.files, prefixed_name)
              print data_value