ManyToMany fields are not showing in if statement in template

Question

I am building a BlogApp and I am stuck on a Problem.

What i am trying to do :-

I am trying to use if statement in template of two many fields BUT if statement is not working correctly.

models.py

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE,default='',unique=True)
    friends = models.ManyToManyField("Profile",blank=True)

class Post(models.Model):
    post_owner = models.ForeignKey(User,default='',null=True,on_delete = models.CASCADE)
    viewers = models.ManyToManyField(settings.AUTH_USER_MODEL,related_name='viewed_posts',editable=False)

views.py

def detail_view(request,pk,slug):
    post = get_object_or_404(Post,pk=pk)

    friend = request.user.profile.friends.all()
    saw = post.viewers.all()

    context = {'friend':friend,'saw':saw}

template.html

{% if request.user.profile.friends.all in post.viewers.all %}

"SHOWING SOME TEXT"

{% endif %}

I am trying to show if request.user friends are in post viewers then show some text.

• When i print {{ request.user.profile.friends.all }} it show friends of request.user, It works correctly.

• AND when i print {{ post.viewers.all }} then it correctly shows the post viewers (users).

When i try to print some text after combine both in if statement then it doesn't showing anything.

I have no idea where is the Mistake.

Any help would be Appreciated.

Thank You in Advance.

Answer 1

You can filter in the view:

def detail_view(request,pk,slug):
    post = get_object_or_404(Post,pk=pk)

    friend = request.user.profile.friends.all()
    saw = post.viewers.all()

    seen_friends = post.viewers.filter(
        id__in=friend.values_list("user_id")
    ).exists()

    context = {
        'friend':friend,'saw':saw, 
        'seen_friends':seen_friends
    }

in template.html:

{% if seen_friends %}

"SHOWING SOME TEXT"

{% endif %}