class ScheduleList(ListView):
    model = Schedule
    queryset = Schedule.objects.all().select_related()
    context_object_name = "schedule_list"

    def get_context_data(self, **kwargs):
        # get all context Schedule class
        context = super().get_context_data(**kwargs)
        # add context about all rights
        rights_list = [i.name for i in RightsList.objects.all()]
        context["rights_list"] = rights_list

        return context