Question

我正在制作一款应用，要求用户上传一些文件。我想将所有文件存储在用户名文件夹中（可能稍后将其移到项目文件夹之外，但这是另一回事）

首先，我正在做一些测试，我采用了这个例子S.O: Need a minimal django file upload example。

就像那样，所以我转到了下一步。

我查了这个问题：

Django FileField with upload_to determined at runtime

我目前的models.py:

# models.py
from django.db import models
from django.contrib.auth.models import User
import os

def get_upload_path(instance, filename):
    return os.path.join('docs', instance.owner.username, filename)

class Document(models.Model):
    owner = models.ForeignKey(User)
    docfile = models.FileField(upload_to=get_upload_path)

我的views.py

@login_required
def list(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile = request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect(reverse('myapp.views.list'))
    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(
        'myapp/list.html',
        {'documents': documents, 'form': form},
        context_instance=RequestContext(request)
    )

所有已接受的答案，导致相同的解决方案。但我在instance.owner中遇到错误：

django.contrib.auth.models.DoesNotExist
DoesNotExist
raise self.field.rel.to.DoesNotExist

使用werkzeug debbuger：

>>> instance
<Document: Document object>
>>> instance.owner
Traceback (most recent call last):

File "<debugger>", line 1, in <module>
instance.owner
File "C:\Python27\lib\site-packages\django\db\models\fields\related.py", line 343,     in    __get__
raise self.field.rel.to.DoesNotExist
DoesNotExist

我错过了什么？

非常感谢你。

Answer 1

您正尝试将Document对象保存为：

newdoc = Document(docfile = request.FILES['docfile'])
newdoc.save()

但您尚未为其设置owner，get_upload_path方法中instance.owner未定义/设置instance.owner.username并且newdoc = Document(docfile = request.FILES['docfile']) newdoc.owner = request.user #set owner newdoc.save()将失败。

您可以将保存更改为：

DocumentForm

我不确定，你owner是什么。但如果它还有newdoc字段，那么您可以直接保存它，而不是单独创建... if form.is_valid(): newdoc = form.save() ...：

{{1}}

Django每个用户关系错误上传文件

1 个答案: