Question

我希望能够通过我的视图更改用户的“sendmail”布尔值。但是，为具有值True的用户添加一次对象后，我无法再更改它，因为我在/ accounts / send_me_email / column user_id处获得“IntegrityError”并不是唯一的。我做错了什么？

models.py

class SendMeMail(models.Model):
    user = models.ForeignKey(User, unique=True)
    sendmail = models.BooleanField()

views.py

from userprofile.models import SendMeMail
def send_me_email(request):
    """
    Define if a user want email notifications or not
    """

    # Check for current sendmail value and act accordingly
    sendme = SendMeMail(user=request.user)

    if sendme.sendmail == False:
        sendme.sendmail = True
        sendme.save()
    if sendme.sendmail == True:
        sendme.sendmail = False
        sendme.save()
    else:
        sendme.sendmail = True
        sendme.save()

Answer 1

这一行：

sendme = SendMeMail(user=request.user)

没有按照你声称的那样做。它不会从数据库中加载当前用户的SendMeMail对象 - 它会为该用户创建一个 new 对象。由于您（正确地）将用户字段声明为唯一，因此在保存时失败。

相反，你的意思是：

sendme = SendMeMail.objects.get(user=request.user)

Answer 2

并且可能会改变

if sendme.sendmail == False:
    sendme.sendmail = True
    sendme.save()
if sendme.sendmail == True:
    sendme.sendmail = False
    sendme.save()
else:
    sendme.sendmail = True
    sendme.save()

到

sendme.sendmail = !sendme.sendmail
sendme.save()

它更短我认为）

更改用户对象的布尔值

2 个答案: