How do I implement snap chat streak like feature?

I am failing to build logic regarding streak feature similar to Snapchat. Here is how streak gets counted in snapchat problem is. if the user adds a new data record once every 24 hours streak is one irrespective of how many records he/she adds and streak is 0 if he/she fails to add with in next time period and adds by +1 in next 24 hours timeframe from last record added.

Streak is actually based on user and answer if user adds answer than streak is maintained.

I tried this code in django but any help in any language will be valuable

class ModelAnswer(BaseModel):
    questions = models.ForeignKey(
        to=Questions,
        on_delete=models.CASCADE
    )
    answer = models.TextField()
    user = models.ForeignKey(User, on_delete=models.CASCADE)

    current_streak = models.PositiveIntegerField(
        null=True,
        blank=True,
        default=0,
        editable=False

    )

here is my main logic part this is not working as per required

def save(self, *args, **kwargs):

    today = timezone.now()
    yesterday = today - timedelta(days=1)
    print(today,yesterday)

    # get the categories created yesterday to maintain the streak
    answers_created_yesterday = ModelAnswer.objects.filter(
        Q(created_at__gte=yesterday),
        Q(created_at__lt=today),
        user=self.user
    ).order_by('-id').last()

    if answers_created_yesterday is not None:
        self.current_streak = answers_created_yesterday.current_streak + 1
    else:
        self.current_streak = 1
    print(self.current_streak)
    super(ModelAnswer, self).save(args, kwargs)

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