def fun_call(request, pk, newsitem_pk=None):
newsindex = get_object_or_404(
Page.objects.specific().type(NewsIndexMixin), pk=pk)
NewsItem = newsindex.get_newsitem_model()
user = get_user(request)
policy = CollectionOwnershipPermissionPolicy(model=NewsItem,
auth_model=NewsItem)
if perm == 'add':
return function(request=request,
newsindex=newsindex,
NewsItem=NewsItem,
user=user,
policy=policy)
newsitem = get_object_or_404(NewsItem,
newsindex=newsindex,
pk=newsitem_pk)
if perm == 'change':
newsitem = newsitem.get_latest_revision_as_newsitem()
if not policy.user_has_permission_for_instance(
user, perm, newsitem):
raise PermissionDenied()
return function(request=request,
newsindex=newsindex,
user=user,
NewsItem=NewsItem,
newsitem=newsitem,
policy=policy)
