如何知道当前用户是否跟随django-friendship中的另一个用户

Question

朋友们，我正在使用django-friendship来实现用户跟随我的应用程序。我试图弄清楚如何知道当前登录的用户是否跟随另一个用户。我在models.py中使用自定义函数。

models.py

class UserProfile(models.Model):
    user = models.OneToOneField(User,unique=True)
    designation= models.CharField(max_length=32,choices=DESIGNATION,default="student", null=True)
    faculty = models.CharField(max_length=32,choices=FACULTIES, default="bridge", null=True)
    rep = models.IntegerField(default=0)
    image_off = models.BooleanField(default=False)
    scripts_off = models.BooleanField(default=False)
    picture = models.ImageField(upload_to='profile_images', blank=True)

    # find out if the user is followed by current user
    def is_followed(self,*args):
    follows = Follow.objects.follows(self.user,*args)
    if follows:
        return True
    else:
        return False

和我的模板

{% for u in users %}
   {% if not u.userprofile.is_followed request.user %}
       <a href="{% url 'follow' u.username %}">Follow</a>
   {% endif %}
{% endfor %}

我哪里错了？帮帮我朋友。