[Zope] manage_addMyZClass

[Mark James Adams]

Hi Gang,

I've created an external method manage_addMyZClass, basing my method off 
http://www.zope.org/Members/tazzzzz/addZClasses .

However, whenever I call this external method on an ObjectManager 
derived ZClass, I get the error "Error Type: AttributeError; Error 
Value: this" on line 8, which just happens to be:

self = self.this()

I know that the this() call is needed so self equals the current context 
of the ObjectManager on which manage_addMyZClass is being called.

Is there any other way to programmatically add a ZClass defined through 
the ZMI? And while I'm on that topic, what are the benefits/tradeoffs 
between using the ZMI to define products and using Python? I recently 
read the "A very minumal Product" How-To 
(http://www.zope.org/Members/maxm/HowTo/minimal_01), and noticed that 
this showed how write a manage_addMyZClass method in the context of a 
Python based product.

The only reasons I've been given about defining products in the 
filesystems with Python vs. using the ZMI are being able to use external 
editors and CVS. Neither of these reasons are compelling enough for me, 
so why should else I use Python?

I'm just starting a another Zope based site, and I have a slew of 
ZClasses to define. In the other (and first Zope based site) that I 
created and maintain I used only the ZMI to define ZClasses, so I'm 
pretty familiar with the process.

Also, if I decide to go with Python based products, is there any easy 
way to turn a ZClass defined though the ZMI into a Python product? I'm 
not to worried about retyping code, but I've defined some fairly large 
propertysheets that would be annoying to recreate if I were to start 
from scratch.

Thanks!

--
Mark Adams
mja27@cornell.edu
"A man talking sense to himself is no madder than a man talking nonsense 
not to himself." - Rosencrantz and Guildenstern Are Dead