Change likedislike app to reaction app

Question

Maciej UrmańskiJuly 21, 2020, 6:12 p.m.

Change likedislike app to reaction app

Hi, I create app following the tutorial on evileg, but I do some changes.

My code:

class LikeDislikeManager(models.Manager):
    use_for_related_fields = True

    def likes(self):
        # We take the queryset with records greater than 0
        return self.get_queryset().filter(vote__gt=0)

    def dislikes(self):
        # We take the queryset with records less than 0
        return self.get_queryset().filter(vote__lt=0)

    def sum_rating(self):
        # We take the total rating
        return self.get_queryset().aggregate(Sum('vote')).get('vote__sum') or 0     

class LikeDislike(models.Model, Activity):
    LIKE = 1
    POWER = 1
    WOW = 1
    SUCCESS = 1
    BLOW = 1

    VOTES = (
        (LIKE, 'Polubienie'),
        (POWER, 'Jest moc!'),
        (WOW, 'Wow'),
        (SUCCESS, 'Świetnie!'),
        (BLOW, 'Mózg rozwalony!'),
    )

    vote = models.SmallIntegerField(verbose_name='Like', choices=VOTES)
    user = models.ForeignKey(User, verbose_name='Użytkownik polubił', on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)

    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey()

    objects = LikeDislikeManager()

    @property
    def activity_actor_attr(self):
        return self.user

I don't change views.py and almost everything works fine but reaction count. I don't know how to count particural reaction. Any idea? :)

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The question is asked by the articleDjango - Tutorial 023. Like Dislike system using GenericForeignKey

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July 22, 2020, 2:09 a.m.
The answer was marked as a solution.

Hello,

In my tutorial I use +1 and -1 for Like and Dislike, because of it is very easy to get total sum, like rating. But you have different idea of reaction. You can not use +1 and -1 and make sum of these reaction.

But you can set up different types of reactions like this

LIKE = 1
POWER = 2
WOW = 3
SUCCESS = 4
BLOW = 5

And you need to write the following manager

class LikeDislikeManager(models.Manager):
    use_for_related_fields = True

    def likes(self):
        return self.get_queryset().filter(vote=1)

    def powers(self):
        return self.get_queryset().filter(vote=2)

    def wows(self):
        return self.get_queryset().filter(vote=2)

    def successes(self):
        return self.get_queryset().filter(vote=2)

    def blows(self):
        return self.get_queryset().filter(vote=2)

But in this conception you don't use sum_rating . I think it is useless

MU

July 25, 2020, 7:47 p.m.

Thank you! This is it. :)

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