Python django-查询对象列表及其对象字段

我想检查每个线程中所有消息的MessageState，即order\u Threads\u消息，如果其中任何线程隐藏了所有消息，则将该线程设置为hidden（隐藏），或者将其从order\u Threads\u消息中删除。在将视图传递给模板之前，我希望在视图中执行此操作。我该怎么做？如果你不明白，请问我。我很乐意解释。请帮助我如何在视图中执行此操作。我将不胜感激。多谢各位

models.py：

class Thread(models.Model):
    subject = models.CharField(max_length=50, blank=True, null=True)
    user = models.ManyToManyField(User)

class ThreadState(models.Model):
    thread = models.ForeignKey(Thread)
    user = models.ForeignKey(User)
    thread_hidden = models.BooleanField(default=False)

class Message(models.Model):
    thread = models.ForeignKey(Thread)
    sender = models.ForeignKey(User)
    sent_date = models.DateTimeField(default=datetime.now)
    body = models.TextField()

class MessageState(models.Model):
    message = models.ForeignKey(Message)
    user = models.ForeignKey(User)
    read = models.BooleanField(default=False)
    message_hidden = models.BooleanField(default=False)

views.py

@login_required
def message(request):
    user = request.user
    threads = user.thread_set.all()
    order_threads_message = threads.annotate(max_sent_date=Max('message__sent_date')).order_by('-max_sent_date')
    if order_threads_message.count() > 0:
        recent_thread = order_threads_message[0]
        if recent_thread.message_set.all().count() > 0:
            recent_thread_conversations = recent_thread.message_set.all()
            return render(request, 'conversations.html', {
                'all_threads':order_threads_message,
                'conversations':recent_thread_conversations,
                'active': recent_thread.id
                })
        else:
            recent_thread_conversations = 0
            return render(request, 'conversations.html', {
                'all_threads':order_threads_message,
                'conversations':recent_thread_conversations,
                'active': recent_thread.id
                })
    else:
        order_threads_message = 0
        recent_thread_conversations = 0
        return render(request, 'conversations.html', {
            'all_threads':order_threads_message,
            'conversations':recent_thread_conversations,
            })

---

我已对以下模型运行了此查询：

模型

质疑

---

如果MessageState的message_hidden中至少有一个为False，则此查询将返回线程对象。

我不太理解MessageState为什么是与message分开的模型，特别是为什么您有ForeignKey关系-这意味着每条消息可以有多个MessageState，这是没有意义的，如果一个州说隐藏，而另一个州不说呢？是的，这就是问题的关键。因此，对于已隐藏该消息的用户，该消息可能会被隐藏，但对其他未隐藏该消息的用户仍然可见。我将进行验证并再次返回。@ruddra Hi，我收到一个错误字段错误：无法将关键字“messagestate\u message”解析为字段。选项：body，id，messagestate，sender，sender，id，sent，date，thread，thread实际上我通过提供相关的名称稍微修改了@Kakar的定义，请检查我的答案：。

class Thread(models.Model):
    subject = models.CharField(max_length=50, blank=True, null=True)
    user = models.ManyToManyField(User)

class ThreadState(models.Model):
    thread = models.ForeignKey(Thread)
    user = models.ForeignKey(User)
    thread_hidden = models.BooleanField(default=False)

class Message(models.Model):
    thread = models.ForeignKey(Thread, related_name = 'message_thread')
    sender = models.ForeignKey(User)
    sent_date = models.DateTimeField(default=datetime.now)
    body = models.TextField()

class MessageState(models.Model):
    message = models.ForeignKey(Message, related_name='messagestate_message')
    user = models.ForeignKey(User)
    read = models.BooleanField(default=False)
    message_hidden = models.BooleanField(default=False)

Thread.objects.filter(message_thread__in = Message.objects.filter(messagestate_message__in=MessageState.objects.filter(message_hidden=False)))