[Zope] ZClass Virgin

[Robin Becker]

In article <004201bef175$d45a2de0$7b5addc7@laptop>, Kevin Dangoor
<kid@kendermedia.com> writes
>-----Original Message-----
>From: Robin Becker <robin@jessikat.demon.co.uk>
>To: zope@zope.org <zope@zope.org>
>Date: Saturday, August 28, 1999 12:45 PM
>Subject: [Zope] ZClass Virgin
>
>
>>What's the preferred way to change a property. Eg say I have a property
>>count and I want to increment this each time the object is viewed. I've
>>tried various constructs like
>><dtml-call count="count+1"> ....</dtml-let>, but the count always goes
>>back to the original value.
>
>This should do it:
><dtml-call "propertysheets.YourPropSheet.manage_changeProperties({'count' :
>count+1})">
>
>Keeping in mind of course that you still have that ages old "this creates a
>transaction each time the method is hit" issue that's
>come up with the previous counter products...
>
>Kevin
>
apparently this might not happen if we use _v_ type names

as Stephan Richter says
A few weeks back I posted the same question. See the archives. :)

you need to write some external methods. The variable you use for the
counter
should start with _v_ which gives it protected status. But you can call
this
attr only with a python function.

have fun,
stephan

 --
Stephan Richter
-- 
Robin Becker