Untitled

def product_list(request, category_slug=None):
    category = None
    categories = Category.objects.all()
    products = Product.objects.filter(available=True)

    if category_slug:
        category = get_object_or_404(Category, slug=category_slug)
        products = products.filter(category=category)

    return render(
        request,
        "shop/product/list.html",
        {"category": category, "categories": categories, "products": products},
    )