我在使用 django taggit "Can't call add with a non-instance manager" 时收到此错误

Question

我正在尝试使用 django taggit 向我的 post 对象添加一些标签。所以我尝试了这个

    def panties():
        from lxml import html
        pan_url = 'http://www.ideos.org'
        shtml = requests.get(pan_url, headers=headers)
        soup = BeautifulSoup(shtml.text, 'html5lib')
        video_row = soup.find_all('div', {'class': 'video'})
        name = 'pan videos'
        author = User.objects.get(id=1)
        tags = Post.tags.add("Musica", "video")   <------here

        def youtube_link(url):
            youtube_page = requests.get(url, headers=headers)
            soupdata = BeautifulSoup(youtube_page.text, 'html5lib')
            video_row = soupdata.find_all('script', {'type': 'text/javascript'})
            entries = [{'text': str(div),
                        } for div in video_row]

            tubby = str(entries[4])
            urls = re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', tubby)
            return urls

        def embed(url):
            new_embed = url.replace("watch?v=", "embed/")
            return new_embed

        entries = [{'href': div.a.get('href'),
                    'src': youtube_link(div.a.get('href'))[1],
                    'text': div.h4.text,
                    'comments': div.h4.text,
                    'name': name,
                    'url': div.a.get('href'),
                    'embed': embed(youtube_link(div.a.get('href'))[0]),
                    'author': author,
                    'video': True,
                    'tag': tags <------here
                    } for div in video_row][:13]

但这给了我错误信息

Can't call add with a non-instance manager

然后我尝试了这个

    def panties():
        from lxml import html
        pan_url = 'http://www.ideos.org'
        shtml = requests.get(pan_url, headers=headers)
        soup = BeautifulSoup(shtml.text, 'html5lib')
        video_row = soup.find_all('div', {'class': 'video'})
        name = 'pan videos'
        author = User.objects.get(id=1)
        post = Post() <------created instance
        tags = post.tags.add("Musica", "video")

        def youtube_link(url):
            youtube_page = requests.get(url, headers=headers)
            soupdata = BeautifulSoup(youtube_page.text, 'html5lib')
            video_row = soupdata.find_all('script', {'type': 'text/javascript'})
            entries = [{'text': str(div),
                        } for div in video_row]

            tubby = str(entries[4])
            urls = re.findall('http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', tubby)
            return urls

        def embed(url):
            new_embed = url.replace("watch?v=", "embed/")
            return new_embed

        entries = [{'href': div.a.get('href'),
                    'src': youtube_link(div.a.get('href'))[1],
                    'text': div.h4.text,
                    'comments': div.h4.text,
                    'name': name,
                    'url': div.a.get('href'),
                    'embed': embed(youtube_link(div.a.get('href'))[0]),
                    'author': author,
                    'video': True,
                    'tag': tags
                    } for div in video_row][:13]

它给了我这个错误信息

Post 对象需要有主键值才能访问它们的标签。我怎样才能使这项工作？我在做什么甚至可能吗？任何帮助将不胜感激。

Answer 1

您正在尝试向 Post 管理器添加标签。您想要将标签添加到 Post 实例。

您需要一个已保存的 Post 实例才能添加标签

例如

post_instance = Post.objects.get_or_create(foo=bar) tags = post_instance.tags.add("Musica", "video")

Answer 2

在@luke_aus 回答的帮助下，我明白了。这就是我的代码现在对于可能想看看如何实际执行的其他人来说的样子。它来自这个。

    for entry in entries:
            post = Post()
            post.title = entry['text']
            title = post.title
            if not Post.objects.filter(title=title):
                post.title = entry['text']
                post.name = entry['name']
                post.url = entry['url']
                post.body = entry['comments']
                post.image_url = entry['src']
                post.video_path = entry['embed']
                post.author = entry['author']
                post.video = entry['video']
                post.status = 'draft'
                post.save()

至此

    for entry in entries:
            post = Post()
            post.title = entry['text']
            title = post.title
            if not Post.objects.filter(title=title):
                post.title = entry['text']
                post.name = entry['name']
                post.url = entry['url']
                post.body = entry['comments']
                post.image_url = entry['src']
                post.video_path = entry['embed']
                post.author = entry['author']
                post.video = entry['video']
                post.status = 'draft'
                post.save()

                saved_post = Post.objects.get(title=title)
                tags = saved_post.tags.add("Musica", "video")
                post.tags = tags
                post.save()

希望这对某人有所帮助

我在使用 django taggit "Can't call add with a non-instance manager" 时收到此错误

I am getting this error using django taggit "Can't call add with a non-instance manager"

python

django

django-taggit