old_contents: from django.views.generic import ListView, FormView
  
  
  class BrowseView(ListView, FormView):
      """
      Class Based view for working with changelists.
      """
      def post(self, *args, **kwargs):
          return self.http_method_not_allowed(*args, **kwargs)
  
      def get_form_kwargs(self):
          kwargs = {
              'initial': self.get_initial(),
              'queryset': self.object_list,
              'data': self.request.GET,
              'files': self.request.FILES,
          }
          return kwargs
  
      def get_context_data(self, **kwargs):
          form_class = self.get_form_class()
          form = self.get_form(form_class)
          kwargs['form'] = form
          if form.is_valid():
              kwargs['object_list'] = form.queryset
          else:
              kwargs['object_list'] = form.base_queryset.none()
          kwargs = super(BrowseView, self).get_context_data(**kwargs)
          return kwargs
  
new_contents: from django.views.generic import ListView, FormView
  
  
  class BrowseView(ListView, FormView):
      """
      Class Based view for working with changelists.
      """
      def post(self, *args, **kwargs):
          return self.http_method_not_allowed(*args, **kwargs)
  
      def get_form_kwargs(self):
          kwargs = {
              'initial': self.get_initial(),
              'queryset': self.object_list,
              'data': self.request.GET,
              'files': self.request.FILES,
          }
          return kwargs
  
      def get_context_data(self, **kwargs):
          form_class = self.get_form_class()
          form = self.get_form(form_class)
          kwargs['form'] = form
          if form.is_valid():
              kwargs['object_list'] = form.get_queryset()
          else:
              kwargs['object_list'] = form.base_queryset.none()
          kwargs = super(BrowseView, self).get_context_data(**kwargs)
          return kwargs
  
subject: fix BrowseView queryset api to use method