Django中添加用戶時，如外鍵得到django.utils.functional .__ proxy__例外

Question

我試圖從舊的MySQL數據庫到新的Django的通訊應用程序導入新聞訂閱，代碼如下：

for _ns in CmsModuleNmsList.objects.using('old').all(): 
      ns = Newsletter(pk=_ns.listid, title=_ns.name, slug=slugify(_ns.name), email='email@email.com', sender='Admin') 
      ns.save() 
      for _list in CmsModuleNmsListuser.objects.using('old').filter(listid=_ns.listid): 
       try: 
        _user = CmsModuleNmsUsers.objects.using('old').get(userid=_list.userid) 
        user = None 
        try: 
         user = User.objects.get(email=_user.email) 
        except: 
         print "Cannot find user" 
        Subscription(newsletter=ns, user=user, subscribed=True, email_field=_user.email, name_field=_user.username, create_date=_user.dateadded).save() 
       except Exception as e: 
        transaction.rollback() 
        print _user.username, 'Error', str(e) 

當我運行它，我得到這樣的異常，由此線Subscription(newsletter=ns, user=user, subscribed=True, email_field=_user.email, name_field=_user.username, create_date=_user.dateadded).save()，如果我拿出user=user我沒有得到例外。

Answer 1

確定通過通訊的代碼挖後，我發現這株引起的問題：

assert ((self.user and not self.email_field) or 
       (self.email_field and not self.user)), \ 
      _('If user is set, email must be null and vice versa.') 

我設置的用戶還設置電子郵件...

參考https://docs.djangoproject.com/en/dev/ref/unicode/#translated-strings