[Zope] Avoiding AttributeErrors in SkinScript
Itai Tavor
itai@optusnet.com.au
Fri, 16 Feb 2001 18:35:30 +1100
Hi,
I have the following SkinScript (greatly simplified):
WITH Parties.getPersonForEmail(self.id) COMPUTE
party=RESULT
WITH self.party COMPUTE
member_id=email
If getPersonForEmail returns None, the second clause returns
AttributeError: party. If I change the first clause to party=RESULT
or '', I can change the second to:
WITH (self.party is not '') and self.party.email or '' COMPUTE
member_id=RESULT
But this is both ugly and bad - in the real script I have many
clauses using party, so repeating this nonsense in all of them is
very wasteful, and also it would be better if party is set to None
when a Person is not found. But if party is set to None, the DataSkin
considers it to be undefined, so I can't do WITH (self.party is not
_.None)...
Is there any nicer way of preventing AttributeErrors in clauses that
try to access an attribute that was set to None?
TIA, Itai
--
--
Itai Tavor -- "Je sautille, donc je suis." --
itai@optusnet.com.au -- - Kermit the Frog --
-- 'Supposing a tree fell down, Pooh, when we were underneath it?' --
-- 'Supposing it didn't,' said Pooh after careful thought. --