Django @property calculating a model field: FieldError: Cannot resolve keyword

Solved by using sorted()

I was using a query with order_by() to call rating. order_by() is at the database level and doesnt know about my property. Soultion, use Python to sort instead:

sorted(Restaurant.objects.filter(category=category[0]), key=lambda x: x.rating, reverse=True)[:5]

If you encounter a similar error check through your views for anything that might be calling the property. Properties will no longer work at the datatbase level.