MU
Maciej UrmańskiNov. 3, 2019, 1:22 a.m.

Django follow unfollow

Django, django, python

Hi,

I try to solve my problem. I have follow and unfollow button on profile page, and on this page button works but I need to create this button on other pages. My problem is to filter when user is in target or not.

On profile page I have code:

{% 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 %}

In views this looks like that:

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

This filter come from function "do_i_follow_users" as you can see in views. But how to take user in other situation like this:

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})

I don't know how to add this function "do_i_follow_users(request.user, [profile_user])" on view "commentgoal".
My Follow model is:

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)

I must check if comment author is in target. Maybe someone help me.

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4
Evgenii Legotckoi
  • Nov. 3, 2019, 2:05 a.m.
  • (edited)

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.

    MU
    • Nov. 3, 2019, 3:18 a.m.

    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()
    
      Evgenii Legotckoi
      • Nov. 3, 2019, 3:37 p.m.

      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 %}
      
        MU
        • Nov. 3, 2019, 4:18 p.m.
        • The answer was marked as a solution.

        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
        

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