[Zope] [Fwd: TALs Expressions]

Brian Brinegar brinegar at purdue.edu
Fri Jan 28 10:18:31 EST 2005


After some more searching I found my answer. The pipe is not an OR 
operator in TALs. Instead it separates path expressions and the first 
expression that exists is evaluated.

-Brian

Ben Last (Zope) wrote:
> At the risk of being thought somewhat lateral here...
> 
>><h2 tal:condition="template/title | template/id">Has a Title or Id</h2>
> 
> 
> I'd do this as:
> <h2 tal:condition="python:template.title or template.id">Has a Title or Id</h2>
> ...since the rules for Python expressions are generally easier to understand or clarify with the use of parentheses. :)
> 
> ben
> 
> 
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