django 实现 导航栏的变化

要实现类似下面的

一般情况是 先在后端实现 再在前端渲染

后端

parent_object = models.FileRepository.objects.filter(
    id=int(folder_id),
    file_type=2,
    project=request.tracer.project).first()



# 做导航栏
        breadcrumb_list = []
        parent = parent_object
        while parent:
            breadcrumb_list.insert(0, {'id': parent.id, 'name': parent.name})
  
            parent = parent.parent
# 传到前端

　　return render(request, 'file.html',
              {'breadcrumb_list':breadcrumb_list})

前端

<div>
     <a href="{% url 'file' project_id=request.tracer.project.id %}">
         <i class="fa fa-home" aria-hidden="true"></i>
         <span>文件库</span>
     </a>
     {% for record in breadcrumb_list %}
         <a href="{% url 'file' project_id=request.tracer.project.id %}?folder={{ record.id }}">
            <i class="fa fa-caret-right" aria-hidden="true"></i>
            <span>{{ record.name }}</span>
         </a>
     {% endfor %}
</div>