[Zope] dtml-lesson learned...

[Maik Jablonski]

and still another lesson... python this time. it's my learning day 
today. ;-)

**explicit is better than implicit!**

IMPLICIT [no checks at all => that's the dark side of coding]:

return context.title[context.title.find('#')+1:]

BETTER:

title=context.getProperty('title')

if title<>'':
       pos = title.find('#')
       if pos<>-1:
            return title[pos+1:]
return title

that's enough for today.

cheers, maik

Maik Jablonski wrote:
> hi,
> 
> I've just learned my DTML-lesson... Don't use DTML for any 
> program-logic!!! Not even the small bits...
> 
> Debuged 3 hours...
> 
> if've used this snippet for months and it worked well...
> 
> <dtml-return "_['title'][_['title'].find('#')+1:]">
> 
> today it stopped working with an "access denied"-error... don't ask 
> why... I've no idea, but maybe I've touched a guarded-namespace... 
> typical DTML-mystery.
> 
> this python one works well:
> 
> return context.title[context.title.find('#')+1:]
> 
> ergo: don't use DTML for logic, use Python!
> 
> maybe: don't use DTML for presentation, use ZPT [I'm not totally 
> convinced of that by now, but especially for Chris W.: maybe I will 
> following your ZPT-church in the near future too...;-)]
> 
> cheers, maik

-- 
Maik Jablonski                 __o
www.zfl.uni-bielefeld.de     _ \<_    Deutsche Zope User Group
Bielefeld, Germany          (_)/(_)               www.dzug.org