[Templates] How To Throw Exception on Missing Method

[Matisse Enzer]

On Jul 25, 2007, at 8:36 PM, Bill Moseley wrote:

> On Wed, Jul 25, 2007 at 01:30:46PM -0700, Matisse Enzer wrote:
>> (re-posted because I stoopidly left out the Subject on the prior
>> posting. I apologize.)
>>
>> How do get Template Toolkit to throw an exception if it encounters a
>> call to a non-existent method?
>
> You want it globally, or just in some cases?
>
>     DEBUG_UNDEF
>
> Otherwise, I'd test for values and use THROW if I didn't like what I
> got.


So I have tried the DEBUG_UNDEF approach, but, I now find that it  
doesn't do what I want.

With DEBUG_UNDEF this template produces an error if    someMethod()   
exists but
returns and empty list:

     [% FOREACH thing IN object.someMethod %]
         [% thing %]
     [% END %]

What I want is an error only if $object is undef, or if there is no    
someMethod()   defined, and I want this behavior globally.

What's the best practice for achieving this?

-M

------------------------------------
Matisse Enzer
menzer@apple.com