IndexError，列表索引超出范围。 Django-allauth信号 [英] IndexError, list index out of range. Django-allauth signals

问题描述

当社交用户在facebook.com上更改性别时，我正在使用信号来更新性别。
信号正常。我可以注册并登录，并且fb用户的性别正在更新。

I'm using signals to update gender, when social user change their gender on facebook.com. Signals work fine. I can sign up and login and gender is updating for fb users.

#app/models.py

@receiver(user_signed_up)
@receiver(user_logged_in)
def set_gender(sender, **kwargs):
    user = kwargs.pop('user')
    extra_data = user.socialaccount_set.filter(provider='facebook')[0].extra_data  
    gender = extra_data['gender']

    if gender == 'male':
        user.gender = u'M'
    elif gender == 'female':
        user.gender = u'F'
    user.save()

但是我注意到，对于普通帐户，当
我尝试在 / accounts / signup 进行注册或在进行登录/ accounts / login 我收到此错误：

But I've noticed that for normal accounts when I try to sign up at /accounts/signup or sign in at /accounts/login I got this error:

Exception Type: IndexError
Exception Value: list index out of range

但是，正常用户成功保存到数据库后，注册和登录后仅出现此错误。

However normal users are succesfully saved to database, I only have this error after registration and login.

我认为这会引起问题：

extra_data = user.socialaccount_set.filter(provider='facebook')[0].extra_data

推荐答案

您是正确的，那是有问题的行。您可能想要更多类似的东西：

You are correct, that is the problematic line. You probably want something more like:

from django.db.models import ObjectDoesNotExist

@receiver(user_signed_up)
@receiver(user_logged_in)
def set_gender(sender, **kwargs):
    user = kwargs.pop('user')
    try:
        extra_data = user.socialaccount_set.get(provider="facebook").extra_data
    except ObjectDoesNotExist:
        pass
    else:
        gender = extra_data['gender']

        if gender == 'male':
            user.gender = 'M'
        elif gender == 'female':
            user.gender = 'F'
        user.save()

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