我的 Django 视频上传模型说“ValueError”

Question

我正在尝试编写一个小型博客，我可以在其中上传我的视频以供公众下载，但是当我尝试单击任何视频以获取详细信息时，我收到了 服务器错误 消息。以下是当 Debug 设置为 True 时出现的错误

ValueError at /video/lagos-anthem/
Sample larger than population or is negative
Request Method: GET
Request URL:    https://www.majestylink.com/video/lagos-anthem/
Django Version: 3.1.2
Exception Type: ValueError
Exception Value:    
Sample larger than population or is negative
Exception Location: /home/majestyempire/.virtualenvs/majestyenv/lib/python3.7/random.py, line 321, in sample
Python Executable:  /usr/local/bin/uwsgi
Python Version: 3.7.5
Python Path:    
['/var/www',
 '.',
 '',
 '/var/www',
 '/home/majestyempire/.virtualenvs/majestyenv/lib/python37.zip',
 '/home/majestyempire/.virtualenvs/majestyenv/lib/python3.7',
 '/home/majestyempire/.virtualenvs/majestyenv/lib/python3.7/lib-dynload',
 '/usr/lib/python3.7',
 '/home/majestyempire/.virtualenvs/majestyenv/lib/python3.7/site-packages',
 '/home/majestyempire/musicblog/myblog']
Server time:    Sat, 28 Nov 2020 13:49:35 +0100

下面是我的 models.py

class Video(models.Model):
    
    CATEGORY_CHOICES = (
        ('Music', 'Music'),
        ('Movies', 'Movies'),
        )

    artist = models.CharField(max_length=200, unique=True)
    category = models.CharField(max_length=30, choices=CATEGORY_CHOICES, default='Music')
    title = models.CharField(max_length=200, unique=True)
    slug = models.SlugField(default='', blank=True, unique=True)
    thumbnail = models.ImageField(blank=False)
    video_file = models.FileField(default='')
    uploaded_date = models.DateTimeField(default=timezone.now)
    objects = PostManager()

    class Meta:
        ordering = ['-uploaded_date']

    def save(self):
        self.uploaded_date = timezone.now()
        self.slug = slugify(self.title)
        super(Video, self).save()

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('video:detail', kwargs={'slug': self.slug})

这是 post_detail 视图

def post_detail(request, slug):
    random_posts = random.sample(list(Video.objects.all()), 2)
    vid = get_object_or_404(Video, slug=slug)
    comments = Comment.objects.filter(post=vid)
    is_liked = False

    context = {
        'Video': Video,
        'vid': vid,
        'random_posts': random_posts,
    }
    return render(request, 'video/video_detail.html', context)

Answer 1

我认为，这意味着您正在尝试从大小小于您想要的样本数量的集合中进行采样。