-----------------------
in urls.py
-----------------------
from django.views.generic.date_based import object_detail
from django.contrib.auth.decorators import login_required

urlpatterns = patterns('',
    (r'^archive/$', login_required(object_detail)),
     ...,
)

close - you need to import login_required, and pass it the arguments 
as if you didn't have login_required on it at all