[Zope] "global name 'REQUEST' is not defined"

[Joseph A Knapka]

hans wrote:
> 
> Joseph A Knapka wrote:
> 
> > Er... OK... It works fine if I use a DTML /document/ rather
> > than a DTML /method/. So are DTML methods totally useless
> > or what? </flamebait>
> >
> > Cheers,
> >
> > -- Joe
> >
> > Joseph A Knapka wrote:
> > >
> > > Hello, all,
> > >
> > > Once again, it seems I must be misunderstanding something
> > > very basic. I have a DTML method that's being called from
> > > a DTML document, and it contains the code:
> > >
> > > <dtml-if expr="REQUEST.get(field_var)">
> > > ...
> > > </dtml-if>
> > >
> > > where field_var is a dtml variable that has been set to
> > > the name of another dtml variable that certainly exists
> > > in the parent document. For example, field_var == "lastname",
> > > and the parent DTML document has either received
> > > "lastname=Blah" in its request, or has done
> > > "REQUEST.set('lastname','')" if not. But the code above
> > > yeilds an error:
> > >
> > > "global name 'REQUEST' is not defined".
> > >
> > > Since it's defined in the parent document, shouldn't it
> > > also be defined for the DTML method? According to "The
> > > Book of Zope" the REQUEST object is defined "for the
> > > duration of the web request"; surely that must include
> > > the invocation of DTML methods within the target
> > > document?
> > >
> > > Thanks in advance,
> 
> http://www.zope.org/Members/michel/ZB/AppendixB.dtml says:
> __call__(client=None, REQUEST={}, **kw)
> 
> maybe, you should pass REQUEST explicitly, like
> <dtml-call "your_method(this(), REQUEST, _.None)">

Ah, now I understand. If I want to pass *any* arguments to
the method, I must also explicitly pass REQUEST. But if
I call the method without arguments, it will magically
be passed the caller's REQUEST.

Thanks,

-- Joe
"I should like to close this book by sticking out any part of my neck
 which is not yet exposed, and making a few predictions about how the
 problem of quantum gravity will in the end be solved."
 --- Physicist Lee Smolin, "Three Roads to Quantum Gravity"