UpdateKnowledge

class UpdateKnowledge(PermissionRequiredMixin, UpdateView):
    permission_required = "usuario.add_center"
    model = Knowledge
    template_name = "knowledge_update.html"
    form_class = KnowledgeCreate

    def get(self, request, *args, **kwargs):
        form = self.form_class(initial=self.initial)

        try:
            knowledge = request.user.profile.center.knowledge
        except:
            return HttpResponseRedirect(reverse_lazy('Center:knowledge_create'))

        return render(request, self.template_name, {'form': form})

    def get_object(self, queryset=None):
        queryset = Knowledge.objects.get(center=self.request.user.profile.center)
        return queryset

    def get_success_url(self):
        return reverse('Center:center_detail', args=[self.request.user.profile.center.slug])