[Zope] Re: upgrade 2.5.1 to 2.7.5 causes error in product code

John Schinnerer wrote:

Hello,

Thanks Tres, looks like zope 2.7.5/python 2.3.5 is triggering a genuine full-blown error on my code

python:here.sponsors[0] != ''

if the tuple is empty, whereas 2.5.1/2.1.3 must have been returning some equivalent of boolean 'false' when the tuple was empty.

Now I do this

python: (here.sponsors) and (here.sponsors[0] != '')

and it works again. The second condition may be redundant now I suppose...?

Yes in earlier Zopes, changing a lines property in the ZMI to empty still resulted in ('',) instead of (). This has been fixed since. Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of R&D +33 1 40 33 71 59 http://nuxeo.com fg@nuxeo.com