[Zope] [Fwd: TALs Expressions]

[Brian Brinegar]

Please explain, I've got this page template, with an empty title.

<h2 tal:condition="template/title">Has a Title</h2>
<h2 tal:condition="template/id">Has an Id</h2>
<h2 tal:condition="template/title | template/id">Has a Title or Id</h2>

The rendered out put is:

<h2>Has an Id</h2>

So...

<h2 tal:condition="template/title">Has a Title</h2>

The tag is omitted because there is no title, which is what I would
expect (empty string evaluates to false).

<h2 tal:condition="template/id">Has an Id</h2>

The tag is included because there is an Id, again what I would expect.

<h2 tal:condition="template/title | template/id">Has a Title or Id</h2>

The tag is omitted (what???) but there is an id, I would expect this to
evaluate to true (false | true == true). (In fact.. anything to the
right of the pipe is not even accessed/called)

Is there something wrong in my thinking?

-Brian