Harmony/main/views.py

from django.shortcuts import render,get_object_or_404
from django.http import HttpResponse
from .models import Category, Product
from cart.forms import CartAddProductForm

def home(request):
    # Ваш код для отображения главной страницы
    return render(request, 'main/base.html')

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,'main/product/list.html',
             {'category': category,
             'categories': categories,
             'products': products})

def product_detail(request, id, slug):
     product = get_object_or_404(Product,
     id=id,
     slug=slug,
     available=True)
     cart_product_form = CartAddProductForm()

     return render(request,
     'main/product/detail.html',
                   {'product': product,
                    'cart_product_form': cart_product_form})


# Функция для страницы "О нас"
def about(request):
    return render(request, 'main/about.html')  # предполагается, что у вас есть шаблон about.html в папке main