[Zope3-Users] Weird behaviour of ViewPageTemplateFile()

[Jim Fulton]

On Apr 10, 2008, at 2:59 PM, Martin J. Laubach wrote:
>>> > ViewPageTemplate must be in the view's namespace, and it magically
>>> > fishes out the view, view's context and request, and makes them
>>> > available in the TAL namespace.
>>>
>>> Ah, so there _IS_ heavy magic involved here. Thanks for
>>> clarifying that, I was already doubting my sanity!
>>
>>
>> This is exactly the same magic that methods use.  
>> ViewPageTemplateFiles
>> are, like functions, meant to be used as methods and to be bound to
>> instances.
>
>  Okay, then this leads me to the strong suspicion that what I'm
> (mis)using ViewPageTemplateFiles for is the wrong way to attack
> the problem.
>
>  What I'm doing is something along the lines of
>
> 	class MyView(BrowserView):
> 	    def __call__(self):
> 	        pagename = somehow_compute_new_page_name(self.request,  
> self.context)
> 	        pt = ViewPageTemplateFile(pagename)
> 	        return pt.__get__(self, self.__class__)()
>
>  but quite obviously, that's not how it's meant to be used, is it...
> Perhaps I need a radically different approach?

Need is too strong. You might prefer another approach based on what  
you now know. :)

Fred suggested using a page-template class that doesn't behave as a  
method.

Another option might be to create a bunch of methods and then have  
your function dispatch to those, depending, of course, on how many  
there are.

Jim

--
Jim Fulton
Zope Corporation