Django ORM - 检索数据时出错 -

Question

我正在创建一个页面，其中包含一个视频，多个 cmets，每个评论的回复 我可以检索视频和 cmets，但最终没有检索到每个评论的回复。 我在视图文件中做了一些 for 循环，但也不知道如何在模板文件中检索它。 到目前为止，我一直在视图和模板之间徘徊

我正在使用 django 1.10.4

models.py

class Video(models.Model):
    title = models.CharField(max_length=120)
    embed_code = models.CharField(max_length=500)
    slug = models.SlugField(null=True, blank=True)
    category = models.ForeignKey("Category", null=True)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)
    active = models.BooleanField(default=True)
    featured = models.BooleanField(default=False)
    free_preview = models.BooleanField(default=False)
    share_message = models.CharField(max_length=150, default=default_share_message)

    objects = models.Manager()
    # activemodel = ActiveModel()
    featuresandactive = Features()
    class Meta:
        unique_together = ('slug', 'category')
    def __str__(self):
        return self.title

    def get_absolute_url(self):
        try:
            return reverse('video_detail', kwargs={'vid_slug':self.slug, 'cat_slug':self.category.slug})
        except:
            return "/"


class Comment(models.Model):
    id = models.AutoField(primary_key=True)
    user = models.ForeignKey(MyUser)
    path = models.CharField(max_length=350)
    video = models.ForeignKey(Video, null=True, blank=True)
    text = models.TextField()
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)
    Timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
    active = models.BooleanField(default=True)


    objects = CommentManager()
    def __str__(self):
        return self.text


class Reply(models.Model):
    user = models.ForeignKey(MyUser)
    comment = models.ForeignKey(Comment,null=True, blank=True)
    text = models.TextField()
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)
    Timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
    active = models.BooleanField(default=True)


    objects = ReplyManager()
    def __str__(self):
        return self.text

views.py

def video_detail(request, cat_slug, vid_slug):

    cat = Category.objects.get(slug=cat_slug)
    comments = Comment.objects.filter(video=obj)
    replys = Reply.objects.filter(comment=comments)

    context = {

    "cat": cat,
    "obj":obj,
    "comments":comments,
    "replys":replys,

    }
    return render(request, 'video_detail.html', context)

这是另一个视图.py 我也试过了，但没有用

def video_detail(request, cat_slug, vid_slug):

    cat = Category.objects.get(slug=cat_slug)

    obj = Video.objects.get(slug=vid_slug)

    comments = obj.comment_set.all()

    Replies = Reply.objects.filter(comment_id=comments.id))

    context = {

    "cat": cat,
    "obj":obj,
    "comments":comments,
    "replies":replies
    }
    return render(request, 'video_detail.html', context)

Answer 1

IMO，您可以在模板中表示 cmets。您的模板可能如下所示。

# your_template.html
{% for comment in obj.comment_set.all %}
    {{comment.user}}: {{comment.text}}
    {% for reply in comment.reply_set.all %}
        {{reply.user}}: {{reply.text}}
    {% endfor %}
{% endfor %}

那么您的视图函数只需要cat 和obj，而不需要comments 或replies。另请查看select_related。