django - 文件分块上传：避免保存两次

Question

我使用自定义函数上传文件，将其拆分为块，如此处所述。我的问题是在上传我的文件两次save()后调用handle_uploaded_file()，一次进入“MEDIA_URL/my_path”目录，一次进入“MEDIA_URL”。但我只想上传一个，一个有块的。可以强制save()进行“分块”上传吗？还是我应该使用不同的方法？谢谢你。

• 模型.py

  class ShapeFile(models.Model):
      name = models.CharField(max_length=100)
      srid = models.ForeignKey(SpatialRefSys)
      user = models.ForeignKey(User)
      color_table = models.ForeignKey(ColorTable)
      file = models.FileField(upload_to="my_path")
      class Meta:
          unique_together = ('name', 'user')
  

• 表格.py

  class UploadForm(ModelForm):
      class Meta:
          model = ShapeFile
          fields = ('name','user','srid','file','color_table')
          widgets = {'srid': TextInput(),
                     'user': HiddenInput()
  

• 视图.py

  def handle_uploaded_file(fileName, filePath):
      with open(filePath, 'wb+') as destination:
          for chunk in fileName.chunks():
              destination.write(chunk)
  
  @login_required
  def shapeIng(request):
      if request.method == 'POST':
          form = UploadForm(request.POST, request.FILES)
          if form.is_valid():
              req = request.POST
  
              # Split uploaded file into chunks
              fileName = request.FILES['file']
              filePath = ShapeFile(file=fileName).file.path
              handle_uploaded_file(fileName, filePath)
  
              form.save()
  
              messages.success(request, 'Shapefile upload succesful!')
              return redirect('shapeCreated')
          else:
              messages.error(request, 'Something went wrong uploading Shapefile.')
      else: # request.method == 'GET'
          form = UploadForm(initial={'user': request.user})
      return render_to_response('my_app/base_shapeIngestion.html',
                                {'form': form},
                                context_instance=RequestContext(request))
  

Answer 1

将您的视图功能更改为：

def testupload2(request):
    if request.method == 'POST':
        file_name=request.FILES['file']
    form = SomeForm(request.POST, request.FILES)
    if form.is_valid():
        dest_file = open('C:/prototype/upload/'+ str(file_name), 'wb+')
        path = 'C:/prototype/upload/'+ str(file_name)
        for chunk in  request.FILES['file'].chunks():
            dest_file.write(chunk)
        dest_file.close()

    t = get_template("testupload2.html")

    lst = os.listdir('C:/downloads/prototype/prototype/upload/')

    html = t.render(Context({'MEDIA_URL':'http://127.0.0.1:8000/site_media/'}))
    return HttpResponse(html)