django - Django 错误：“ForwardManyToOneDescriptor”对象没有属性“全部”

问题描述

所以我正在制作一个 django 项目，我有以下代码：

我的模型.py：

class ThreadManager(models.Manager):
    def by_user(self, user):
        qlookup = Q(first=user) | Q(second=user)
        qlookup2 = Q(first=user) & Q(second=user)
        qs = self.get_queryset().filter(qlookup).exclude(qlookup2).distinct()
        return qs

    def get_or_new(self, user, other_username): # get_or_create
        username = user.username
        if username == other_username:
            return None
        qlookup1 = Q(first__username=username) & Q(second__username=other_username)
        qlookup2 = Q(first__username=other_username) & Q(second__username=username)
        qs = self.get_queryset().filter(qlookup1 | qlookup2).distinct()
        if qs.count() == 1:
            return qs.first(), False
        elif qs.count() > 1:
            return qs.order_by('timestamp').first(), False
        else:
            Klass = user.__class__
            user2 = Klass.objects.get(username=other_username)
            if user != user2:
                obj = self.model(
                        first=user, 
                        second=user2
                    )
                obj.save()
                return obj, True
            return None, False


class Thread(models.Model):
    first        = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='chat_thread_first')
    second       = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='chat_thread_second')
    updated      = models.DateTimeField(auto_now=True)
    timestamp    = models.DateTimeField(auto_now_add=True)
    
    objects   = ThreadManager()

我的意见.py：

def Messages(request, *args, **kwargs):
    Chats = Thread.objects.all()
    User1 = Thread.first.all()
    context = {
        'content': Chats,
        'user1': User1
    }
    return render(request, "chat/messages.html", context)

我不知道为什么我不能使用 all 方法，我想获取我的线程类模型的第一个对象，但是当我使用它时，会出现（'ForwardManyToOneDescriptor' 对象没有属性'all'），有谁知道是什么继续？

标签： djangodjango-modelsdjango-views

django - Django 错误：“ForwardManyToOneDescriptor”对象没有属性“全部”

问题描述

解决方案

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