code: def delete_view(self, request, object_id, extra_context=None):
          
          try:
              obj = self.get_queryset(request).get(pk=unquote(object_id))
              parent_folder = obj.folder
          except self.model.DoesNotExist:
              parent_folder = None
  
          if request.POST:
              # Return to folder listing, since there is no usable file listing.
              super(FileAdmin, self).delete_view(
                  request=request, object_id=object_id,
                  extra_context=extra_context)
              if parent_folder:
                  url = reverse('admin:filer-directory_listing',
                                kwargs={'folder_id': parent_folder.id})
              else:
                  url = reverse('admin:filer-directory_listing-unfiled_images')
              url = "{0}{1}".format(
                  url,
                  admin_url_params_encoded(request)
              )
              return HttpResponseRedirect(url)
  
          return super(FileAdmin, self).delete_view(
              request=request, object_id=object_id,
              extra_context=extra_context)
docs: Overrides the default to enable redirecting to the directory view after
          deletion of a image.
  
          we need to fetch the object and find out who the parent is
          before super, because super will delete the object and make it
          impossible to find out the parent folder to redirect to.