How to sort the products in the Django online store

How to sort the goods in the online store so that you can click on the button and the sorting has changed, for example: price,-price. And to views.py was in class, not in def.

views.py

class SectionView(View):
    def get(self, request, *args, **kwargs):
        sort_form = request.GET.getlist('sort')
        products = Product.objects.filter(available=True)
        if sort_form.is_valid():
            needed_sort = sort_form.cleaned_data.get("sort_form")
            if needed_sort == "ДТ":
                products = products.order_by(
                    "created")  # или updated  в зависимости от того, что ты вкладываешь в понятие по дате
            elif needed_sort == "ДЕД":
                products = products.order_by("price")
            elif needed_sort == "ДОД":
                products = products.order_by("-price")
        return render(
            request=request,
            template_name='main/index.html',
            context={
                'products':products,
            }
        )

forms.py

class SortForm(forms.Form):
    sort_form = forms.TypedChoiceField(label='Сортировать:', choices=[('ПУ', 'По умолчанию'), ('ДТ', 'По дате'), ('ДЕД', 'От дешевых к дорогим'), ('ДОД', 'От дорогих к дешевым')])

index.py

<form action="{% url 'product_list' %}" method="get" class="sort-form">
  {{ sort_form }}
  <p><input type="submit" name="sort" value="Сортировать"></p>
  {% csrf_token %}
</form>

A sample of how you could approach it:

   class SortProduct:
    
        def __init__(self, products):
            products = products
    
        def sort_by_price(self, descending=False):
    
            if descending:
                self.products = self.products.order_by('-price')
            else:
                self.products = self.products.order_by('price')
    
        def sort_by_popularity(self, descending=False):
            if descending:
                self.products = self.products.order_by('-popularity')
            else:
                self.products = self.products.order_by('popularity')
        
        def filter_brand(self, brandname):
            self.products = self.products.filter(brand=brandname)
    
    class SectionView(View):
    
        def get(self, request):
    
            # Intializing class and setting products data
            _product = SortProduct(products=products.objects.filter(somefilter=request.GET('somefilter')))
    
            #Setting up a filterset
            filterset = {'sort_by_price':_product.sort_by_price,
                         'sort_by_popularity':_product.sort_by_popularity,
                         'filter_brand':_product.filter_brand, 
                         }
            #Filtering using a filterset
            if request.GET('sort_by_price'):
                filterset[request.GET('sort_by_price')](request.GET('descending'))
            if request.GET('sort_by_popularity'):
                filterset[request.GET('sort_by_popularity')](request.GET('descending'))
            if request.GET('filter_brand'):
                filterset[request.GET('filter_brand')](request.GET('brand'))
    
            #Returning filtered products as JSON
            return JsonResponse(list(_product.values()), safe=False)
    
    
    urlpatterns  = [
            path('/product', SectionView.as_views(), name='sectionviews'),
        ]