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我正在尝试通过实现文件大小限制和文件扩展名来验证上传的图像。问题是上传图像时，我想在处理之前验证文件大小限制和文件扩展名，但出现此错误

“member_descriptor”对象不可订阅

forms.py" in clean_image
  43.                         if not file.name[-3:].lower() in ['jpg']:

Exception Type: TypeError at /pro/
Exception Value: 'member_descriptor' object is unsubscriptable
File "C:\Python26\lib\site-packages\django\forms\forms.py" in _get_errors
  115.             self.full_clean()
File "C:\Python26\lib\site-packages\django\forms\forms.py" in full_clean
  270.         self._clean_fields()

我的表格.py

class PersonForm(forms.ModelForm):

    def clean_image(self):
            cleaned_data = super(PersonForm,self).clean()
            image = cleaned_data.get("image")

            if image:
                    if image._size > 4*1024*1024:
                            raise forms.ValidationError("Image Must be <4mb Less")
                    if not file.name[-3:].lower() in ['jpg']:
                            raise forms.ValidationError("Your file extension was not recongized")
                    return image



class Meta:
    model = Person
    fields = ('image',)

视图.py

def pro(request):

    form = PersonForm()
    if request.POST.has_key('pro'):
        form = PersonForm(request.POST,request.FILES)
        if request.POST['pro'] == 'first':
            if form.is_valid():
                person = Person.objects.get(user=request.user)
                image = form.cleaned_data['image']

                if image:
                    person.image = form.cleaned_data['image']
                person.save()

    return render(request,'profile.html',{'form':form})

我的模型.py

class Person(models.Model):
    user = models.ForeignKey(User)
    image = models.FileField(upload_to="images/",blank=True)
    def __unicode__(self):
        return self.name
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1 回答 1

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在引发异常的那一行中，您尝试访问file.name. file是 Python 中的内置类型。这就是您在那里访问的内容。你应该尝试类似的东西if not image.file.name[-3:].lower() in ['jpg']:。

于 2013-04-24T14:30:15.477 回答