Django表单向导不记得使用jasny上传的文件

Question

我已将Jasny fileupload组件包含在向导的现有表单部分中。

表格本身的一切都运作良好。问题是当导航到向导的下一个形式时，然后返回用户上传的文件就消失了。

问题是，如果用户在表单中向后移动，则每次上传文件时都必须重新加载。

我做错了吗？存储该文件的模板部分如下所示：

<div class="fileupload fileupload-new" data-provides="fileupload">
  <div class="fileupload-new thumbnail" style="width: 100px; height: 100px;"><img src="http://www.placehold.it/100x100/EFEFEF/AAAAAA" /></div>
  <div class="fileupload-preview fileupload-exists thumbnail" style="width: 100px; height: 100px;"></div>
  <span class="btn btn-file"><span class="fileupload-new">Select image</span><span class="fileupload-exists">Change</span>
  {{ form.file_img1 }}
  <a href="#" class="btn fileupload-exists" data-dismiss="fileupload">Remove</a>
</div>

<div class="fileupload fileupload-new" data-provides="fileupload">
  <div class="fileupload-new thumbnail" style="width: 100px; height: 100px;"><img src="http://www.placehold.it/100x100/EFEFEF/AAAAAA" /></div>
  <div class="fileupload-preview fileupload-exists thumbnail" style="width: 100px; height: 100px;"></div>
  <span class="btn btn-file"><span class="fileupload-new">Select image</span><span class="fileupload-exists">Change</span>
  {{ form.file_img2 }}
  <a href="#" class="btn fileupload-exists" data-dismiss="fileupload">Remove</a>
</div>