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

Question

I'm trying to add a few tags to my post object when I save them, using django taggit. So I tried this

    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]

but that gave me the error message

Can't call add with a non-instance manager

So I then tried this

    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]

and it gave me this error message

Post objects need to have a primary key value before you can access their tags. How Can I make this work? is what I'm doing even possible? Any help would be appreciated.

Answer 1

You are trying to add tags to the Post manager. You want to add tags to a Post instance.

You need a saved Post instance before you can add the tags

e.g.

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