[Zope] avoiding 'AttributeError'

[Ben Mason]

How about:

<p tal:condition="obj/attribute|nothing"
   tal:replace="obj/attribute" />

Ben 

> -----Original Message-----
> From: zope-bounces at zope.org [mailto:zope-bounces at zope.org] On 
> Behalf Of Malthe Borch
> Sent: 27 March 2005 00:16
> To: zope at zope.org
> Subject: [Zope] avoiding 'AttributeError'
> 
> Hello list, ---
> 
> I can't seem to find an elegant solution to checking if an 
> object has a certain
> attribute. The following fails (i.e. zope dies), if the 
> attribute does not
> exist:
> 
> <p tal:condition="exists: obj/someAttribute"
>    tal:replace="obj/someAttribute" />
> 
> Of course, I just want it to skip the tag. Dying is a bit rash.
> 
> Specifically, I want to test if a certain CGI parameter has 
> been set, i.e. that
> the REQUEST object has a certain attribute.
> 
> What is the best way to do this in both ZPT and Python?
> 
> \malthe
> 
> ----
>  mail: mborch at 3avod.dk
>  blog: www.3avod.dk/blog/
>  crypto-key: 3avod.dk/keys/mborch.asc
> --------------------------------------
> 
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