api.py 文件源码

def retrieve(self, request, pk):
        queryset = self.get_queryset()
        instance = get_object_or_404(queryset, pk=pk)
        children = queryset.filter(parent=instance)

        parent_serializer = self.get_serializer(instance)
        parent_data = parent_serializer.data
        child_serializer = self.get_serializer(children, many=True)
        parent_data['children'] = child_serializer.data

        return Response(parent_data)