[Zope] Re: [Zope-dev] Advanced REQUEST inside Python Class Problem

[Oliver Bleutgen]

> Hello everyone,

> I try to access the REQUEST variable in a Python class, but in certain
> cases this gives me a real headache.

> If I call my object with <dtml-var ObjectInstance>, then I can refer to
> the
> request variable in my Python code with self.REQUEST
> But, if I try: <dtml-var "ObjectInstance">, then I cannot use
> self.REQUEST,
> since the namespace is somehow not passed. BTW, the same seems to be true
> with properties inside a parent object. For some reason, if I call
> __getattr__, the entire "global namespace" (REQUEST and Aquisition) does
> not work correctly anymore.

> Has anyone a clue for me?


Hi Stephan,

<dtml-var ObjectInstance> does some zope-specific
argument passing. This magic isn't available
if you do
<dtml-var "ObjectInstance()"> (notice the brackets,
the way you did it would just cause to render
something like <ObjectInstance at #2424234> 
and wouldn't call the object).
If you do the above you have to explicitly pass
the arguments, i.e. REQUEST and _.
Take a look at dieter maurers excellent writings at
http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html
for instance for a concise explanation what kind
of magic happens with dtml-var.


cheers,
olivver