polnaya XY3ta

class ResultView(TemplateView):

    def get_context_data(self, **kwargs):
        obj = self.kwargs.get('obj')

        data = super().get_context_data(**kwargs)
        data['game_result'] = obj
        return data

    def get(self, request):
        obj = GameSession.objects.filter(user=request.user)[:1]
        get_context_data(obj)