[FIXED] Django function view rewriting to Class View ListView problem with Tag

Issue

Im trying to rewrite my whole app from function views to class views. Right now Im struggle with Tag.

This how its looks before views.py

def tagged(request, slug):
    tag = get_object_or_404(Tag, slug=slug)
    articles = Article.objects.filter(tag=tag)

    paginator = Paginator(articles, 5)
    page_number = request.GET.get("page")
    page_obj = paginator.get_page(page_number)

    context = {
        "tag": tag,
        "page_obj": page_obj,
    }
    return render(request, "web/home.html", context)

And right now Im trying rewrite it to Class View but I dont know how to use get_object_or_404 in class and then filter my model Article by tag

class Tagged(ListView):
    model = Article
    paginate_by = 5

model.py

class Article(models.Model):
    headline = models.CharField(max_length=100)
    article_content = models.CharField(max_length=10000)
    article_author = models.ForeignKey(User, on_delete=models.CASCADE)
    article_photos = models.URLField(blank=True, max_length=300)
    yt_links = models.URLField(blank=True, max_length=300)
    article_image_upload = models.ImageField(blank=True, upload_to="images/")
    slug = models.SlugField(null=True, unique=True, max_length=100)
    tag = TaggableManager(blank=True)
    likes = models.ManyToManyField(User, related_name="article_likes")
    timestamp = models.DateTimeField(auto_now_add=True)

    def serialize(self):

        return {
            "id": self.id,
            "headline": self.headline,
            "article_content": self.article_content,
            "article_author": self.article_author,
            "article_image_upload": self.article_image_upload,
            "tag": self.tag,
            "yt_links": self.yt_links,
            "likes": self.likes,
            "timestamp": self.timestamp.strftime("%b %d %Y, %I:%M %p"),

        }

Solution

You can override get_queryset method to filter Article. For example:

class Tagged(ListView):
    model = Article
    paginate_by = 5

    def get_queryset(self):
        tag = get_object_or_404(Tag, slug = self.kwargs['slug'])
        return super().get_queryset().filter(tag=tag)

Answered By - ruddra