[Zope] How does one access a ZClass property from a ZClass method?

[Kevin Dangoor]

----- Original Message -----
From: "John D. Rowell" <jdrowell@appwatch.com>
To: <zope@zope.org>
Sent: Monday, April 24, 2000 8:06 PM
Subject: Re: [Zope] How does one access a ZClass property from a ZClass
method?


> <dtml-var "zclass.method(zclass, _)">
>
> Which reminds me, will ZClasses be auto-renderable inside tags in the
> future? It seems silly that you can have an index_html method that is
> rendered from a URL, but have to specify stuff as above to use it from
> other DTML Methods/Documents. Is there a better way that I'm not aware
> of?

There has been talk of trying to create a mechanism to do this, but there's
a very good reason for the way it works now. When you access the method via
a URL, Zope automatically passes in the requisite namespace, REQUEST, etc.
If you do,

<dtml-var method>

this is equivalent to <dtml-var name=method>. In this context, Zope passes
the proper parameters in automatically as well.

<dtml-var "method(_.None, _)"> is equivalent to <dtml-var
expr="method(_.None, _)"> which is actually a Python expression. And
*that's* why you need to pass in those parameters... because Zope is not
doing the calling... python is. And python does not automatically pass the
namespace in as a parameter.

There has been talk about trying to change this in the past, but no one had
concrete said they were going to try to implement something. Personally, I
don't think it's so bothersome when you get used to it. In fact, I've even
used the client parameter (the first argument) for a useful purpose a couple
of times.

Kevin