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为什么这个 django-python 片段也在上传的文档列表中显示已删除的文件？

视图.py

def lists(request):
    # Handle file upload
    if request.method == 'POST':
            form = DocumentForm(request.POST, request.FILES)
            if form.is_valid():
                    filename = Document(docfile = request.FILES['docfile'])
                    filename.save()
            # Redirect to the document list after POST
            return HttpResponseRedirect(reverse('sdm:lists'))
            #  return render_to_response(reverse('sdm:lists'))
    else:
            form = DocumentForm() # A empty, unbound form

# Load documents for the list page
    documents = Document.objects.all()

# Render list page with the documents and the form
    return render_to_response(
            'sdm/lists.html',
            {'documents': documents, 'form': form},
            context_instance=RequestContext(request)
    )

列表.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Minimal Django File Upload Example</title>   
</head>
<body>
<!-- List of uploaded documents -->
{% if documents %}
    <ul>
    {% for document in documents %}
        <li><a href="{{document.docfile.url }}">{{ document.docfile.name }}</a></li>
    {% endfor %}
    </ul>
{% else %}
    <p>No documents.</p>
{% endif %}

    <!-- Upload form. Note enctype attribute! -->
    <form action="{% url sdm:lists %}" method="post" enctype="multipart/form-data">
           {% csrf_token %}
      <p>{{form.non_field_errors }}</p>
        <p>{{form.docfile.label_tag }} {{form.docfile.help_text }}</p>
        <p>
            {{ form.docfile.errors }}
            {{ form.docfile }}
        </p>
        <p><input type="submit" name="press" value="Upload" /></p>
    </form>
</body>

浏览器输出

f14 is latest uploaded file and rest all files have been deleted from respective folders but why is that it is still showing all files in list when are not even present?

我是 django-python 的新手，但我尝试调试它但发现了这个。

>>> from sdm.models import Document
>>> Document.objects.all()
 [<Document: Document object>, <Document: Document object>, <Document: Document    
 object>,<Document: Document object>, <Document: Document object>, <Document: Document 
 object>,<Document: Document object>, <Document: Document object>, <Document: Document 
 object>,<Document: Document object>, <Document: Document object>, <Document: Document 
 object>,<Document: Document object>, <Document: Document object>, <Document: Document 
 object>]

不知道怎么看实物？？

在此处输入图像描述

谢谢

编辑： 正如答案和评论中指出的那样，我想告诉你我正在直接从上传的文件夹中删除文件。当文件夹中不存在文件时，有什么方法可以强制 ORM 对象自动更新

4

1 回答 1

1

我看不到您如何删除Document. 您应该有如下方法。

def delete(request):
    if request.method != 'POST':
        raise HTTP404 # don't forget to import
    else:
        docId = request.POST.get('doc-id', None)

    if docId is not None:
        docToDel = Document.objects.get(pk=docId)

        # delete the file using docToDel.docfile

        docToDel.delete()

    return HttpResponse('Whatever message you want.')

更新 1

如果您想在直接删除文件时自动删除对象，您可以迭代 Document 对象并检查文件是否存在。但您需要在上市前或定期运行此程序。

于 2013-11-08T08:13:00.390 回答