from django.shortcuts import render from django.views import generic from django.shortcuts import get_object_or_404 # Create your views here. from markt.models import Factuur, Order, Klant class FactuurDetailView(generic.DetailView): model = Factuur def get_context_data(self, **kwargs): # Call the base implementation first to get the context context = super(FactuurDetailView, self).get_context_data(**kwargs) context['korting'] = context["factuur"].Korting_percent * context["factuur"].Subtotal / 100 return context