Django - 注册新用户时创建新对象

Question

我正在开发一个投注应用程序/猜谜应用程序。用户可以在所有 NFL 比赛上下注并猜测正确的结果。所以我做了 4 个模型（2 个与我当前的问题相关）：

class Customer(models.Model):
    name    = models.ForeignKey(User,on_delete=models.CASCADE)
    points   = models.IntegerField(null=True, default=0)


class Tipp(models.Model):
# model for one gameday (17 gamedays at all)
    user = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True, blank=True)
    week = models.ForeignKey(Game, on_delete=models.CASCADE, null=True, blank=True)
    result_hometeam1     = models.IntegerField(null=True, blank=True)
    result_guestteam1     = models.IntegerField(null=True, blank=True)
    ...

因此，用户每周可以下注 16 场比赛。为此，我创建了一个表单并在模板中实现：

class Tipp_form(ModelForm):
    class Meta:
        model = Tipp
        fields = '__all__'

# views.py
def week(request, pk):
    game = Tipp.objects.get(id=pk)
    form = Tipp_form(initial={'user':request.user, 'week':game}, instance=game)

    if request.method == 'POST':
        form = Tipp_form(request.POST, instance=game)
        if form.is_valid():
            form.save()
    return render(request, 'main/week.html', {
        'game': game,
        'form': form,
     })

一切正常，但现在如果有新用户注册，我不想在每个游戏日创造 17 个新的星期和 16 场比赛！有没有办法说：如果有新用户登录，在Tipp中创建17个新对象并设置user = new User？

Answer 1

您可以为此使用信号，以便每次创建新用户时，也会创建新对象Tipp，例如：

from django.db.models.signals import post_save
from django.dispatch import receiver
from .models import Tipp

@receiver(post_save, sender=User)
def create_user_picks(sender, instance, created, **kwargs):
    if created:
        Tipp.objects.create(user=instance)