Django在索引页上显示帖子，每个帖子下都有少量答案（通过外键链接）

Question

我正在用Django写一个Imageboard，但我无法解决这个基本问题：如何在主页上显示每个帖子的几个答案。我有两个模型，线程和答案，答案通过外键链接到线程。我想在下面展示每一个帖子，上面有三个最新的答案。我真的很想在这里得到一些帮助

Answer 1

使用筛选器标记显示3条注释，https://docs.djangoproject.com/en/2.2/ref/templates/builtins/ 您可以在自定义筛选器标记中找到每个线程的最新3个答案，如下所示

answers = Answer.objects.filter(Thread = Thread).order_by('date')[0:3]

Answer 2

如果您的models.py如下所示：

class Thread(models.Model):
    question = models.TextField()
    # you can add other fields


class Answer(models.Model):
    thread = models.ForeignKey(Thread, on_delete=models.CASCADE, related_name='thread_ans')
    answer = models.TextField()
    if_correct = models.BooleanField()
    # you can add other fields

视图.py

def quest(request):
    q1 = Answer.objects.filter(if_correct=True).select_related('thread')  # if you want only correct answer in template
    q2 = Thread.objects.all().prefetch_related('thread_ans')  # For all answers

    conext = {
        'q1': q1,
        'q2': q2,
    }

在模板中

# <!   For Question and correct  answer    >
{% for i in q1 %}
<p>Ques: i.thread.question</p>
<p>Ans: i.answer</p>
{% endfor %}

# <!   For Question and all answers with correct or incorrect    >
{% for i in q2 %}
<p>Ques: i.question</p>
{% for j in i.thread_ans.all %}
<p>j.answer</p> # <!  Print answer  ->
<p>j.is_correct</p> # <!  Print if correct or not  ->
{% endfor %}
{% endfor %}