在模板中显示相关对象以获取详细视图的问题

Question

我希望在单个episode.object }页面中呈现每个{{ video.object }，其中它对{video.object}很好。但它没有显示任何情节对象..。我想要呈现的最后一个模板video.html可以在这里看到我尝试过的https://ibb.co/K9NMXtS

{% for episode in episodes %}
  {{ episode.title }}
{% endfor %}

但那不起作用。以下是其他配置：-

#models.py
class Video(models.Model):
    title = models.CharField(max_length=100, unique=True)
    slug = models.SlugField(max_length=200, unique=True)
    year = models.CharField(max_length=4)
    category = models.CharField(max_length=3)
    trailer = models.URLField(default='')

def __str__(self):
    return self.title
    

def get_absolute_url(self):
    from django.urls import reverse

    return reverse("video.html", kwargs={"slug": str(self.slug)})


class Episode(models.Model):
    video = models.ForeignKey(Video, related_name='episodes', on_delete=models.CASCADE)
    title = models.CharField(max_length=512)
    air_date = models.DateField()
    videolink = models.URLField(default='')

    def __str__(self):
        return self.title



# urls.py
urlpatterns = [
    path('video/<slug>/', views.VideoDetail.as_view(), name='videos'),
]

# view.py
class VideoDetail(DetailView):
    model = Video
    template_name = 'video/video.html'

    def get_context_data(self, *args, **kwargs):
       context = super().get_context_data(*args,**kwargs)
       context['Episodes'] = Episode.objects.all()
       return context

Answer 1

Python和Django模板区分大小写。在视图中使用Episodes，这与模板中的episodes不匹配。更改其中一个以使其匹配(episodes /Django中的模型实例推荐使用)。

接下来，您正在使用Episode.objects.all()，它将显示所有的插曲。如果您只想要该视频的情节，那么过滤查询集：

context['episodes'] = Episode.objects.filter(video=self.object)

或者，也可以通过向后执行外键获得相同的结果：

context['episodes'] = self.object.episodes.all()

Answer 2

在超级标签中添加VideoDetail，在调用模板{{ episode.video.slug }}时添加self，并在url中添加足够的片段

path('video/<slug>/', views.VideoDetail.as_view(), name='videos'),

类VideoDetail(DetailView)：model = Episode template_name =‘视频/视频.model’

def get_context_data(self, *args, **kwargs):
   context = super(VideoDetail, self).get_context_data(*args,**kwargs)
   context['Episodes'] = Episode.objects.all()
   return context