cbv-decorator1.py

from django.contrib.auth.decorators import login_required
from django.template.response import TemplateResponse
from django.utils.decorators import method_decorator
from django.views.generic import View

class MyClassBasedView(View):
    @method_decorator(login_required)
    def dispatch(self, *args, **kwargs):
        return super().dispatch(*args, **kwargs)

    def get(self, request):
        return TemplateResponse(request, 'index.html')