def descendants(self, request, *args, **kwargs): """Handle listing descendants of a document""" document = self.get_object() # Get descendants - queryset = document.get_descendants().filter(ancestors_deleted_at__isnull=True) + descendants_queryset = document.get_descendants().filter(ancestors_deleted_at__isnull=True) + # Include the parent document itself in the queryset for search + # This allows searching within both the parent and its descendants + parent_queryset = self.queryset.filter(pk=document.pk) + queryset = descendants_queryset | parent_queryset +  queryset = self.filter_queryset(queryset) filterset = DocumentFilter(request.GET, queryset=queryset) if not filterset.is_valid(): raise drf.exceptions.ValidationError(filterset.errors) queryset = filterset.qs return self.get_response_for_queryset(queryset)