Question

views.py

def get(self, request):
    form = HomeForm()
    posts = Post.objects.all().order_by('-created')
    users = User.objects.exclude(id=request.user.id, 
                                 friend = Friend.objects.get(current_user=request.user), 
                                 friends = friend.users.all())

    args = { 'form': form, 'posts': posts, 'users': users, 'friends': friends}
    return render(request, self.template_name, args)

models.py

class Post(models.Model): 
    post = models.CharField(max_length=500) 
    user = models.ForeignKey(User) 
    created = models.DateTimeField(auto_now_add=True) 
    updated = models.DateTimeField(auto_now=True) 

class Friend(models.Model): 
    users = models.ManyToManyField(User) 
    current_user = models.ForeignKey(User, related_name='owner', null=True) 

    @classmethod 
    def make_friend(cls, current_user, new_friend): 
        friend, created = cls.objects.get_or_create( current_user=current_user ) 
        friend.users.add(new_friend)

Answer 1

如果朋友匹配的查询不存在，则必须使用try except。您有关于该文档的文档：Try Except

你第一次写：

try :
    ...

except :
    #when you get doesn't exist

朋友匹配查询不存在

1 个答案: