How can I avoid the duplication of URL queryset parameters? - django-queryset

Question

In the code below, the querysets are for filtering/sorting my products and they work. As you can see if I want to filter already filtered products I just add another queryset URL to it. The problem is how duplicated the code looks. Is there another way around?
Example of how the page looks and URL works
ProductsListView views.py
class ProductsListView(ListView):
model = Product
template_name = 'products_list.html'
context_object_name = 'products'
def get_queryset(self):
products = Product.objects.all()
# SORT BY PRICE
price = self.request.GET.get('price', None)
if price == 'desc':
products = products.order_by('-price')
if price == 'asc':
products = products.order_by('price')
# -- SORT BY PRICE END --
# SORT BY BRAND
brand = self.request.GET.get('brand', None)
if brand is not None:
products = products.filter(brand__iexact=brand)
# -- SORT BY BRAND END --
# SORT BY SEARCH
search = self.request.GET.get('search', None)
if search is not None:
products = products.filter(name__icontains=search)
# -- SORT BY SEARCH END --
# -- SORT BY CATEGORY
category_id = self.request.GET.get('category', None)
if category_id is not None:
products = products.filter(category__id=int(category_id))
# -- SORT BY CATEGORY END --
return products
def get_context_data(self, **kwargs):
context = super().get_context_data()
# CATEGORIES
categories = Category.objects.all()
context['categories'] = categories
# --
# CATEGORY NAME
category_id = self.request.GET.get('category', None)
try:
category_name = Category.objects.get(pk=category_id)
except ObjectDoesNotExist:
category_name = None
context['category_name'] = category_name
# --
brand_name = self.request.GET.get('brand')
context['brand_name'] = brand_name
price_sort_type = self.request.GET.get('price')
context['price_sort_type'] = price_sort_type
# CATEGORY PRODUCTS
# Filtering products by category if in a category
if category_name is not None:
category_products = Product.objects.filter(category__id=category_id)
else:
category_products = Product.objects.all()
context['category_products'] = category_products
# --
return context
ProductsList template
<ul class="list-group">
<li class="list-group-item mr-3">
<a class="dropdown-toggle text-dark" data-toggle="dropdown" href="#">
Brand
</a>
<ul class="dropdown-menu" role="menu" aria-labelledby="BrandDropDown">
{% for p in category_products %}
{% if category_name and price_sort_type %}
<li><a class="dropdown-item" href="{% url 'products' %}?category={{p.category.id}}&price={{price_sort_type}}&brand={{p.brand | urlencode}}">{{p.brand}}</a></li>
{% elif category_name %}
<li><a class="dropdown-item" href="{% url 'products' %}?category={{p.category.id}}&brand={{p.brand | urlencode}}">{{p.brand}}</a></li>
{% elif brand_name %}
<li><a class="dropdown-item" href="{% url 'products' %}?brand={{p.brand}}&price={{price_sort_type}}">{{p.brand}}</a></li>
{% else %}
<li><a class="dropdown-item" href="{% url 'products' %}?brand={{p.brand}}">{{p.brand}}</a></li>
{% endif %}
{% endfor %}
</ul>
</li>
</ul>