Django follow unfollow

Django, django, python

{% if profile_user.followed %}
<a href="{% url 'unfollow' profile_user.id %}" class="btn btn-danger-gradiant btn-rounded letter-spacing-1" id="follow">Przestań obserwować</a>
{% else %}
<a href="{% url 'follow' profile_user.id %}" class="btn btn-danger-gradiant btn-rounded letter-spacing-1" id="follow">Obserwuj</a>
{% endif %}

def profile(request, username):
    '''
    Shows the users profile
    '''
    enricher = Enrich(request.user)
    profile_user = get_object_or_404(User, username=username)
    feed = feed_manager.get_user_feed(profile_user.id)
    activities = feed.get(limit=25)['results']
    context = {}
    do_i_follow_users(request.user, [profile_user])
    context['profile_user'] = profile_user
    context['activities'] = enricher.enrich_activities(activities)
    response = render(request, 'auth/user_detail.html', context)
    return response

def goalcomments(request, slug):
    goal = get_object_or_404(Goal, slug=slug)

    comments = goal.goalcomment.filter(active=True)

    if request.method == 'POST':
        form = CommentGoal(data=request.POST)
        if form.is_valid():
            goal_comment = form.save(commit=False)
            goal_comment.author = request.user
            goal_comment.goal = goal
            goal_comment.save()
    else:
        form = CommentGoal()
    return render(request, 'goals/comments.html',
                {'goal': goal,
                'comments': comments,
                'form': form})

class Follow(Activity, models.Model):

    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='following_set')
    target = models.ForeignKey(User, on_delete=models.CASCADE, related_name='follower_set')
    created_at = models.DateTimeField(auto_now_add=True)
    deleted_at = models.DateTimeField(blank=True, null=True)

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Hello,

Can you show source of do_i_follow_users function. I some misunderstand mechanism of this function. This function only check following relation, or create following relations ?

And I want suggest you to usi django-friendship battery. It is ready django-app for follow/unfollow relations, and for friendship relations.

Ok :)

This is this function:

def do_i_follow_users(user, users):
    followed_user_ids = Follow.objects.filter(user_id=user.id, target__in=users, deleted_at__isnull=True).values_list('target_id', flat=True)
    for u in users:
        u.followed = u.id in followed_user_ids


def do_i_follow(user, follows):
    do_i_follow_users(user, [f.target for f in follows])

I use django getstream.io to create feed etc. I send signal after user click follow or unfollow to getstream. My follow and unfollow views:

@login_required
def follow(request, id):

    user = get_object_or_404(User, id=id)

    follow, created = Follow.objects.get_or_create(user=request.user,target=user)

    return HttpResponse()

@login_required
def unfollow(request, id):

    user = get_object_or_404(User, id=id)

    follow, created = Follow.objects.get_or_create(user=request.user,target=user)
    follow.delete()

    return HttpResponse()

If you want check, is request.user in following users, then I think you can use custom template filter tag.

For example I have user_in filter

@register.filter
def user_in(objects, user):
    if user.is_authenticated:
        return objects.filter(user=user).exists()
    return False

using

{% if objects|user_in:request.user %}
{% elif %}
{% endif %}

I think you can create something else like this

@register.filter
def user_in(objects, user):
    if user.is_authenticated:
        users = [o.author for o in objects]
        return Follow.objects.filter(user_id=user.id, target__in=users, deleted_at__isnull=True).exists()
    return False

and use it

{% if goal_comments|user_in:request.user %}
{% elif %}
{% endif %}

Thank you! For me work that:

{% if comment.author.follower_set.all|user_in:request.user %}
<a href="{% url 'unfollow' comment.author.id %}" class="btn btn-danger-gradiant btn-rounded btn-sm letter-spacing-1" id="follow">Przestań obserwować</a>
{% else %}
<a href="{% url 'follow' comment.author.id %}" class="btn btn-danger-gradiant btn-rounded btn-sm letter-spacing-1" id="follow">Obserwuj</a>
{% endif %}

and this templatetag:

@register.filter
def user_in(objects, user):
    if user.is_authenticated:
        return objects.filter(user=user).exists()
    return False