Modele

class Offer(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField(blank=False)
    price = models.IntegerField()
    contact = models.IntegerField()
    photo = models.ImageField(upload_to='offer_images/',blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    category = models.ForeignKey('Category', null=True, blank=True,on_delete=models.CASCADE)
    slug = models.SlugField(max_length=200, db_index=True,default="None")

    def get_absolute_url(self):
        return reverse('offers:offer_detail',args=[self.title, self.slug])

    class Meta:
        ordering = ('title',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.title


class Category(models.Model):
    name = models.CharField(max_length=200)
    slug = models.SlugField()
    parent = models.ForeignKey('self',blank=True, null=True ,related_name='children',on_delete=models.CASCADE)

    class Meta:
        unique_together = ('slug', 'parent',)
        verbose_name_plural = "categories"


    def __str__(self):
        full_path = [self.name]

        k = self.parent

        while k is not None:
            full_path.append(k.name)
            k = k.parent

        return ' -> '.join(full_path[::-1])


Widoki

class GetOffersByCategory(ListView):
    model = Offer
    template_name = 'offer/offer_list.html'
    context_object_name="offer_list"

    def queryset(self):
        self.category = get_object_or_404(Category, name=self.kwargs['name'])
        return Offer.objects.filter(category=self.category)



class HomeView(ListView):
    model = Category
    template_name = "accounts/home.html"
    context_object_name="category_list"



URl

    path('', views.HomeView.as_view() ,name='home'),
    path('offers/<str:category>',views.GetOffersByCategory.as_view(),name='offers'),


{% for category in object_list %}
    {% url 'offers' Terraristic %}
{% endfor %}