如果数据在今天为用户保存，如何停止保存数据

Question

class RequestPop(models.Model):

    request_pop = models.PositiveIntegerField(default=0)
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE,unique=False,null=True)

    created_at = models.DateTimeField(auto_now_add=True)    
    available_pop = models.PositiveIntegerField(default=0)

    def __str__(self):
        return "{}-{}".format(self.user,self.request_pop)

    def save(self, *args, **kwargs):
        if self.user:
            old_obj = RequestPop.objects.filter(user=self.user).filter(created_at = datetime.today).last()
            if not old_obj:
                super(RequestPop, self).save(*args, **kwargs)

但是我的代码不起作用。今天已存数据，如何停止存数据

Answer 1

我会做类似的事情：

class RequestPop(models.Model):
    request_pop = models.PositiveIntegerField(default=0)
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, unique=False, null=True)

    created_at = models.DateTimeField(auto_now_add=True)
    available_pop = models.PositiveIntegerField(default=0)

    def __str__(self):
        return "{}-{}".format(self.user, self.request_pop)

    def save(self, *args, **kwargs):
        if self.user:
            now = timezone.datetime.now()
            today_midnight = timezone.datetime(day=now.day, month=now.month, year=now.year)
            old_obj = RequestPop.objects.filter(user=self.user).filter(created_at__gte=today_midnight).last()
            if not old_obj:
                super(RequestPop, self).save(*args, **kwargs)

Answer 2

你可以简单地这样做：

RequestPop.objects.filter(user=self.user).filter(created_at__lte = datetime.today()).last()

如果数据在今天为用户保存，如何停止保存数据

How to stop save -data if the data is saved within today for a user

django

django-models