保存模型表单对象后如何从 django FileField 获取多个文件

Question

我有一个带有附加字段的 django ModelForm 来上传一些文件。但是，我需要保存的模型才能对文件执行任何操作，而且我不确定在哪里或如何执行此操作。

我正在关注docs here。

我要么需要在 FormView 中获取保存的模型，要么需要在 Form 中处理它：

class MessageForm(forms.ModelForm):
    class Meta:
        model = Message

    file_field = forms.FileField(widget=forms.ClearableFileInput(attrs={'multiple': True}))

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)
        files = self.cleaned_data.get('files')
        # do stuff with files here...
        # BUT I only get ONE file here, regardless of how many are uploaded with the form.

有没有办法让我获取Form的save方法中的所有文件？

或者，我可以通过视图获取所有文件，但是如何获取我需要的已保存模型？此表单正在创建一个新对象，我需要该对象才能对文件进行处理：

class FileFieldView(FormView):
    form_class = MessageForm
    template_name = 'upload.html'  # Replace with your template.
    success_url = '...'  # Replace with your URL or reverse().

    def post(self, request, *args, **kwargs):
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        files = request.FILES.getlist('file_field')
        if form.is_valid():
            for f in files:
                ...  # Do something with each file.
                 # BUT how do I get the saved object? I don't think it has been saved at this point anyway?
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

Answer 1

if form.is_valid():
        obj = form.save()
        for f in files:
            ...  # Do something with each file.
             # BUT how do I get the saved object? I don't think it has been saved at this point anyway?