关于 django FileField 处理和清理方法的问题

Question

我有一个相当简单的模型：

class Product(models.Model):
    data = models.JSONField()
    number = models.PositiveIntegerField()

我可以通过表格更新：

class ProductForm(forms.Form):
    def __init__(self, *args, **kwargs):
        product = kwargs.pop("product")
        super().__init__(*args, **kwargs)
        self.fields["number"] = forms.IntegerField()
        self.fields[product.data.keys()[0]] = forms.CharField()
        self.fields[product.data.keys()[1]] = forms.FileField()
            ...

     def clean(self):
         cleaned_data = super().clean()
         print(cleaned_data.get("image")) ## prints None
         print(self.files) ## prints: 

一切正常，我将表单放入模板中并设置了enctype="multipart/form-data" 属性，然后我在TemplateView 中收到表单：

class ProductUpdateView(TemplateView):
    template_name = "update_product.html"

    def post(self, request, *args, **kwargs):
        obj = Product.objects.get(pk = kwargs["pk"])
        print(request.FILES) ## prints the correct filename!
        form = ProductForm(request.POST or None, product = obj)
        for key in request.POST.keys():
            ...
        obj.save()
        context = {'product': obj}
        return render(request, self.template_name, context)

为什么self.files打印None，也cleaned_data.get("image")打印<MultiValueDict: {}>，但在视图中，request.FILES正确知道<MultiValueDict: {'image': [<InMemoryUploadedFile: test.png (image/png)>]}>？

Answer 1

在视图中，您需要正确使用表单并构造它：

ProductForm(request.POST<strong>, request.FILES</strong>, product=obj)