old_contents: from django import forms
  from django.conf import settings
  
  from taggit.forms import TagWidget
  
  
  class BootstrapChoiceMixin(object):
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('attrs', {})
          kwargs['attrs'].update({'class': 'form-check-input'})
          super(BootstrapChoiceMixin, self).__init__(*args, **kwargs)
  
  
  class BootstrapCheckboxInput(BootstrapChoiceMixin, forms.CheckboxInput):
      pass
  
  
  class BootstrapRadioSelect(BootstrapChoiceMixin, forms.RadioSelect):
      option_template_name = 'helper/forms/widgets/radio_option.html'
  
  
  class BootstrapFileInput(forms.FileInput):
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('attrs', {})
          kwargs['attrs'].update({'class': 'form-control'})
          super(BootstrapFileInput, self).__init__(*args, **kwargs)
  
  
  class PriceInput(forms.TextInput):
      template_name = "helper/forms/widgets/price_input.html"
  
      def get_context(self, name, value, attrs):
          ctx = super(PriceInput, self).get_context(name, value, attrs)
          ctx['widget'].setdefault('attrs', {})
          ctx['widget']['attrs']['class'] = 'form-control col-3'
          ctx['widget']['attrs']['pattern'] = "[\\d\\.,]*"
          ctx['currency'] = settings.FROIDE_CONFIG['currency']
          return ctx
  
  
  class TagAutocompleteWidget(TagWidget):
      template_name = 'helper/forms/widgets/tag_autocomplete.html'
  
      class Media:
  
          js = (
              'js/tagautocomplete.js',
          )
  
          css_list = [
              'css/tagautocomplete.css'
          ]
          css = {
              'screen': css_list
          }
  
      def __init__(self, *args, **kwargs):
          self.autocomplete_url = kwargs.pop('autocomplete_url', None)
          super().__init__(*args, **kwargs)
  
      def get_context(self, name, value, attrs):
          ctx = super().get_context(name, value, attrs)
          ctx['autocomplete_url'] = self.autocomplete_url
          ctx['tags'] = [v.tag.name for v in value]
          return ctx
  
new_contents: from django import forms
  from django.conf import settings
  
  from taggit.forms import TagWidget
  
  
  class BootstrapChoiceMixin(object):
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('attrs', {})
          kwargs['attrs'].update({'class': 'form-check-input'})
          super(BootstrapChoiceMixin, self).__init__(*args, **kwargs)
  
  
  class BootstrapCheckboxInput(BootstrapChoiceMixin, forms.CheckboxInput):
      pass
  
  
  class BootstrapRadioSelect(BootstrapChoiceMixin, forms.RadioSelect):
      option_template_name = 'helper/forms/widgets/radio_option.html'
  
  
  class BootstrapFileInput(forms.FileInput):
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('attrs', {})
          kwargs['attrs'].update({'class': 'form-control'})
          super(BootstrapFileInput, self).__init__(*args, **kwargs)
  
  
  class PriceInput(forms.TextInput):
      template_name = "helper/forms/widgets/price_input.html"
  
      def get_context(self, name, value, attrs):
          ctx = super(PriceInput, self).get_context(name, value, attrs)
          ctx['widget'].setdefault('attrs', {})
          ctx['widget']['attrs']['class'] = 'form-control col-3'
          ctx['widget']['attrs']['pattern'] = "[\\d\\.,]*"
          ctx['currency'] = settings.FROIDE_CONFIG['currency']
          return ctx
  
  
  class TagAutocompleteWidget(TagWidget):
      template_name = 'helper/forms/widgets/tag_autocomplete.html'
  
      class Media:
  
          js = (
              'js/tagautocomplete.js',
          )
  
          css_list = [
              'css/tagautocomplete.css'
          ]
          css = {
              'screen': css_list
          }
  
      def __init__(self, *args, **kwargs):
          self.autocomplete_url = kwargs.pop('autocomplete_url', None)
          super().__init__(*args, **kwargs)
  
      def get_context(self, name, value, attrs):
          ctx = super().get_context(name, value, attrs)
          ctx['autocomplete_url'] = self.autocomplete_url
          if value is None:
              ctx['tags'] = [v.tag.name for v in value]
          else:
              ctx['tags'] = []
          return ctx
  
subject: Fix context if value is None