[ZPT] PageTemplateFile and other methods

[Evan Simpson]

Peter Bengtsson wrote:

> [not sure if this is only a ZPT question, but I start here]
> 
> my python product starts like this:
> 
> def somemethod():
>     return ('a','b')
> 
> from Products.PageTemplates.PageTemplateFile import PageTemplateFile
> manage_addNetSendForm = PageTemplateFile('netsendform', globals())
> 
> Then there's the file netsendform.zpt in which I try to get access to
> somemethod() but can't.
> I have tried <div tal:define="res here/somemethod">
> and container and options and modules (security problems).

Tricky one.  Your Product's module is not accessible through any of the 
builtin template names, except indirectly through "modules".  You 
*could* stuff the function directly into the Template, by saying:

manage_addNetSendForm.somemethod = somemethod

If you want to provide several addition methods to the Template, you 
would probably be better off subclassing:

class ThisPageTemplate(PageTemplateFile):
   def method1(self):
       pass
   #etc.
manage_addNetSendForm = ThisPageTemplate('netsendform', globals())

In either case, you would need to add security declarations, like so (in 
the class body):

     from AccessControl import ClassSecurityInfo
     security = ClassSecurityInfo()
     security.declareProtected('View', 'method1')

Finally, you will access the method using the "template" variable, as in 
"tal:define="foo template/method1".

Cheers,

Evan @ digicool