Объект 'builtin_function_or_method' не имеет атрибута 'split' в django
def index(request):
product = ()
catProds = Product.objects.values(category)
cats = {items['category'] for items in catProds}
for cat in cats:
prod = Product.objects.filter(category=cat)
product.append(prod)
params = {'product':product}
return render(request, 'shop/index.html', params)