django只将参数从视图传递到窗体一次

我有一个OTP生成器机制,在GET方法中,生成一个唯一的4-dit OTP,并将其发送到OTPAuthenticationForm(),如下所示:

视图.py

if request.method == 'GET':
   otp = 'abcd'
   # code to send otp via mail
   form = OTPAuthenticationForm(request=request, otp=otp) # this is how the OTP is passed only once.
   return ....
elif request.method == 'POST':
    form = OTPAuthenticationForm(request.POST, request=request)
    if form.is_valid():                 # the clean_field() method is not invoked/throws error.
       print("OTP is valid")
    else: 
       print("OTP is invalid")

表单.py

from django.contrib.auth.forms import AuthenticationForm


class OTPAuthenticationForm(AuthenticationForm):
    otp = forms.CharField(required=True, widget=forms.TextInput)

    def __init__(self, otp, *args, **kwargs):
       self.otp = kwargs.pop("otp")

       super(OTPAuthenticationForm, self).__init__(*args, **kwargs)

    def clean(self):
       if self.otp!= self.cleaned_data['otp']:
          raise forms.ValidationError("Invalid OTP")

如何将生成的otp只传递一次给OTPAuthForm(),以便根据用户输入otp(通过电子邮件接收的otp)对其进行验证。

更新: OTPAuthenticationForm(forms.Form) 之前导入的类AuthenticationForm()需要用户名、密码字段和自定义OTP字段。

这就是为什么form.is_valid()返回为无效,因为在应用程序中分别处理用户名、密码身份验证。