使用 UserCreationForm Django 从上一页处理的电子邮件创建用户

Question

我正在尝试使用电子邮件作为用户名创建用户，并且首先筛选电子邮件，即电子邮件未注册然后创建用户。我如何在 forms.py 中传递或设置电子邮件，因为它已经在上一页中处理过了？模型.pyfrom django.contrib.auth.models import AbstractBaseUserfrom django.db import modelsclass CUserManager(models.Manager):    def _create_user(self, email, password, **extra_fields):        now = timezone.now();        if not email:            raise ValueError(_('Email is required'))        user = self.model(            email = email,            date_joined = now, **extra_fields        )        user.set_password(password)          user.save(using = self._db)        return account    def create_user(self, email, password=None, **extra_fields):        return self._create_user(email, password, **extra_fields)    def get_by_natural_key(self, email):        return self.get(email=email)    def create_superuser(self, email, password, **extra_fields):        return self._create_user(email, password,**extra_fields)class CUser(AbstractBaseUser):    email = models.EmailField(_('email address'), unique=True)    first_name = models.CharField(_('first name'), max_length=255)    last_name = models.CharField(_('last name'), max_length=255)    date_joined = models.DateTimeField(_('date created'), auto_now_add=True)    is_active = models.BooleanField(default=True)        objects = CUserManager()    USERNAME_FIELD = 'email'...表单.pyfrom django.contrib.auth.forms import UserCreationFormclass RegistrationForm(UserCreationForm):    class Meta:         model = CUser        fields = ('first_name', 'last_name', 'password1', 'password2')在 HTML 中 <form action=""  method="post" role="form">    {% csrf_token %}  {{ form.as_p }}  <input type="submit" value="Submit" /></form>电子邮件来自保存在上一页中的 session['email']。如何将此会话 ['email'] 传递给 forms.py？