将值传递给Django模型属性

Question

I am building a file upload page where files will be saved with a different prefix in their name (get_file_path function uses instance.mname) but will go through the same upload model/form. I want the prefix to be declared in the views in form in mname='prefix'. How can I pass this value from views to form?

Thank you!

models.py

class Upload(models.Model):

    mname = # need it to be passed
    document = models.FileField(upload_to=get_file_path, validators=[validate_file_extension])
    upload_date=models.DateTimeField(auto_now_add =True)

forms.py

class UploadForm(forms.ModelForm):
    class Meta:
        model = Upload
        fields = ('document',)

views.py

def uploadFile(request):
    if request.method == "POST":

        file = UploadForm(request.POST, request.FILES, mname='....')
        if file.is_valid():
           file.save()

Answer 1

You could add a parameter to the __init__ of the form:

UploadForm(forms.Form):

    def __init__(self, path, *args, **kwargs):
        super(UploadForm, self).__init__(*args, **kwargs)
        self.fields['document'] = forms.FileField(upload_to=path, validators=[validate_file_extension])

And initializing the form with this parameter:

file = UploadForm(request.POST, request.FILES, path='...')