在哪里/如何替换 Django CBV 中的默认上传处理程序？

我试图为基于类的视图指定处理文件上传的特定方法。根据docs https://docs.djangoproject.com/en/1.11/topics/http/file-uploads/#s-id1这可以通过以下方式实现：

from django.core.files.uploadhandler import TemporaryFileUploadHandler
request.upload_handlers = [TemporaryFileUploadHandler(request=request)]

如果我在中指定这一点post的方法FormView像这样：

def post(self, request, *args, **kwargs):
    request.upload_handlers = [TemporaryFileUploadHandler(request=request)]
    return super().post(self,  request, *args, **kwargs)

I get:

AttributeError: You cannot set the upload handlers after the upload has been processed.

类似的变体产生相同的结果：

def post(self, request, *args, **kwargs):
    self.request.upload_handlers = [TemporaryFileUploadHandler(request=self.request)]
    form = self.get_form()
    if form.is_valid():
        return self.form_valid(form)
    else:
        return self.form_invalid(form)

但是当我在get这个方法无效：

 def get(self, request, *args, **kwargs):
    request.upload_handlers = [TemporaryFileUploadHandler(request=self.request)]  
    return super().get(self,  request, *args, **kwargs)

如果我上传一个小文件，它仍然使用默认值django.core.files.uploadhandler.MemoryFileUploadHandler.

我究竟做错了什么？

EDIT

另外，当我尝试反映中的建议时note https://docs.djangoproject.com/en/1.11/topics/http/file-uploads/#id1，我也得到同样的结果AttributeError:

from django.views.decorators.csrf import csrf_exempt, csrf_protect

@csrf_exempt
def post(self, request, *args, **kwargs):
    request.upload_handlers = [TemporaryFileUploadHandler(request=request)]
    return self._post(request, *args, **kwargs)

@csrf_protect
def _post(self, request, *args, **kwargs):
    form = self.get_form()
    if form.is_valid():
        return self.form_valid(form)
    else:
        return self.form_invalid(form)

好的，终于开始工作了（使用@Alasdair 提供的建议）。设置一个method decorator(crsf_exempt) on post还不够，还需要开启dispatch。对于未来遇到此问题的任何人来说，情况如下：

from django.views.generic import FormView
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_exempt, csrf_protect


@method_decorator(csrf_exempt, 'dispatch')
class UploadDataSetView(FormView):

    def post(self, request, *args, **kwargs):
        request.upload_handlers = [TemporaryFileUploadHandler(request=request)]  
        return self._post(request)

    @method_decorator(csrf_protect)
    def _post(self, request):
        form = self.get_form()
        if form.is_valid():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

如果删除也会失败{% csrf_token %}从您的模板（这就是您想要的）。