Green Phase: Simple function

def product_list(request): products = Product.objects.all() return JsonResponse({'products': list(products.values())})

Refactor: Class-based view

class ProductListView(View): def get(self, request): products = Product.objects.all() return JsonResponse({'products': list(products.values())})

Refactor: Generic view

class ProductListView(ListView): model = Product context_object_name = 'products'

### Express Patterns