[Zope] organizational questions

[Jim Fulton]

Martin Dougiamas wrote:
> 
> Martijn Faassen wrote:
> >
> > Probably some mild level of Zope Zen is needed to realize fully that
> > *folders* are acquired by subfolders too -- recently I faced similar
> > organizational issues as well, and used this to good effect.
> >
> > I had the same setup with a root folder and a number of sub folders, and
> > common SQL methods in the root folder so that they were acquired. As I
> > had quite a few SQL methods this started to get messy. So I made a
> > subfolder called 'sql' and moved all SQL methods to that place. Now I
> > have a nice and clean root folder.
> >
> > Zen: All the sub folders acquire this SQL folder.
> >
> > Of course I had to adapt my DTML documents in the subfolders from things
> > like:
> >
> > <!--#call "insert_whatever(REQUEST)"-->
> >
> > to:
> >
> > <!--#call "sql.insert_whatever(REQUEST)"-->
> >
> > so it's easier to set this up the right way in the beginning.
> >
> > You can use the same strategy for any common documents.
> 
> I really like the sound of this, and I've been re-organising my
> Zope application organisation, but I've hit a snag.
> 
> I used to call DTML documents with
> 
>   <!--#var myfunction-->
> 
> so now, since they are in a sibling folder under the root folder,
> (eg /myapp) I tried:
> 
>   <!--#var myapp.myfunction-->
> 
> But it doesn't work any more - keeps giving KeyErrors.
> 
> The funny thing is that
> 
>   <!--#var "myapp.myfunction"-->
> 
> correctly returns all the raw content of the DTML document,
> so it *can* find it OK.
> 
> Any ideas?

Sure.  See my response to Paul.  The bottom line is that 
you have to call the document template explicitly when you use
it in a (Python) expression:

   <!--#var "myapp.myfunction(None, _)"-->

This is the way that DocumentTemplates call other document
templates when they aren't used in expressions.  It is important to
pass the current document template namespace, '_' as the second 
argument.  This provides access to the current namespace to
the document template being called.  The first argument, 'None', 
is just a placeholder, since these arguments are positional.

Jim

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