如何在Django中使用get_next_by_FOO()?

我正在建立博客网站，并尝试分别为下一篇文章和上一篇文章放置 next 和 prev 按钮.

I am building blog website and trying to put next and prev buttons for next post and previous post respectively.

在正式文档中，它解释了 get_next_by_FOO(** kwargs)和，其中FOO是字段名称.这将返回有关日期字段的下一个和上一个对象.

In the official document, it explains get_next_by_FOO(**kwargs) and where FOO is the name of the field. This returns the next and previous object with respect to the date field.

因此，我的models.py和views.py正在关注.

So my models.py and views.py are following.

models.py

models.py

class Post(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
    class Meta:
        ordering = ["-timestamp", "-updated"]

views.py

def post_detail(request, id=None):
    instance = get_object_or_404(Post, id=id)
    the_next = instance.get_next_by_title()
    context ={
        "title": instance.title,
        "instance": instance,
        "the_next" : the_next,
    }
    return render(request, "post_detail.html", context)

我误解了它的概念吗?如果这样做，我该如何处理?提前致谢！

Do I misunderstand its concept?? If I do, how can I deal with it? Thanks in advance!