'QuerySet' object has no attribute 'subs' - filtering

Question

Can someone pls explain how can I filter users posts if user is subscriber or not?
'QuerySet' object has no attribute 'subs'
I use custom user
class Every(AbstractBaseUser):
user = models.OneToOneField(settings.AUTH_USER_MODEL, unique=True)
name = models.CharField(max_length=30, blank=True)
Here is post model:
class Post(models.Model):
user = models.ForeignKey(User, blank=True, null=True)
text = models.TextField(max_length=1200)
A subscriber model:
class Sub(models.Model):
user = models.OneToOneField(User, related_name='user')
subs = models.ManyToManyField(User, blank=True, related_name='subs')
A view that I'm trying to use:
def tape(request, every_id):
context = {}
context.update(csrf(request))
post_form = PostForm
pform = post_form
sub = Sub.objects.filter(subs=every_id)# here I get users that intersting for my user
tape = Post.objects.filter(user=sub.subs).order_by("-timestamp")
username = request.user
context = {"username": username, "pform": pform, "tape": tape, "sub": sub,}
return render(request, 'tape.html', context)

Answer 1

actually it would be better to use a class view. But here is an answer with an usual view. We need to get subscription's and subscribers's ids before we start filter posts
here is even a bit more :-)
def get_user_id_list(user):
"""Returns a list of subscribers's ids"""
try:
sub = user.user
Sub.DoesNotExist:
return []
return sub.subs.all().values_list('user_id', flat=True)
def get_user_id_list_2(user):
"""Returns a list of subscription's ids"""
return user.subs.values_list('user_id', flat=True)
def tape(request):
pform = PostForm
user_id_list = get_user_id_list_2(request.user)
logger.info('user_id_list = {}'.format(user_id_list))
tape = Post.objects.filter(user_id__in=user_id_list).order_by("-timestamp")
username = request.user
context = {
"username": username,
"pform": pform,
"tape": tape,
"sub": sub,
}
return render(request, 'tape.html', context)