用户注册时出现Django IntegrityError

Question

当我尝试使用django-allauth

扩展用户配置文件时出现错误

Exception Type: IntegrityError at /accounts/signup/
Exception Value: workerapp_userprofile.user_id may not be NULL

这是我在我的django项目的workerapp应用程序中的models.py，我要求另外两个字段以及其他注册信息。

from django.db import models
from django.contrib.auth.models import User

class UserProfile(models.Model):
  # This line is required. Links UserProfile to a User model instance.
  user    = models.OneToOneField(User, unique=True)
  # The additional attributes we wish to include.
  website = models.URLField(blank=True)
  picture = models.ImageField(upload_to='profile_images', blank=True)

  # Override the __unicode__() method to return out something meaningful!
  def __unicode__(self):
    return self.user.username

我的用户正确保存，我可以在管理员中看到，这只是在注册过程中显示此错误。