1views + 2 querysets + фильтр через get

================views.py=======================
class AdsList(ListView):
    model = Ads
    template_name = 'main/ad_list.html'
    context_object_name = 'ads'
    paginate_by = 5
    extra_context = {'all_tags': Tag.objects.all()}

    def get_queryset(self):
        tag = self.request.GET.get('tag')
        if tag is None:
            return Ads.objects.all()
        return Ads.objects.filter(tags__name=tag)
================urls.py=========================
path('ads/', views.AdsList.as_view(), name='ads'),
================template========================
{% for tag in all_tags %}
    <a href="?tag={{ tag.name }}" class="list-group-item">{{ tag.name }} </a>
{% endfor %}