[Zope-CMF] ZClass content type question...

[sean.upton@uniontrib.com]

Perhaps this is the wrong list for this question... I am currently using
ZClasses to extend some Python products I have written for use as CMF
content types.  I am subclassing my content class (which provides its own
DublinCore and other metadata implementations) and also PortalContent.  My
concern is the places where there are method name/implementation overlaps
between these two superclasses.

Normally, outside of using a ZClass, I would just override the method, and
call the method in the appropriate superclass.  I thought I might be able to
do this by using an external method inside my ZClass, but I'm not sure of
the best way to get a reference to the superclasses.  I've tried:
	myClass = self.__class__
	bases = myClass.__bases__
	...which will get something like this:
(<extension class ZClasses.ZClass.PersistentClass at 851a680>, <extension
class Products.ZXPContent.NITFCoreImpl.NITFCoreImpl at 8c32c28>, <extension
class Products.CMFCore.PortalContent.PortalContent at 8683dd0>, <extension
class OFS.SimpleItem.SimpleItem at 8471170>)

If I have my external method do something like this, I assume I can do this:

import string
def Date(self):
	myClass = self.__class__
	bases = myClass.__bases__
	for base in bases:
		if string.find(base.__name__, 'NITFCoreImpl') != -1:
			useThisBase = base
			break
	return useThisBase.Date(self)

I assume that I can do this wherever I need to, but is this the best
approach to doing this, or is there something more simple that I'm not aware
of - or simply not seeing?

Sean

+-----------------------------------------------------------
| Sean Upton
|  Site Technology Supervisor             SignOnSanDiego.com
|  Development & Integration     The San Diego Union-Tribune
|  619.718.5241                     sean.upton@uniontrib.com
|        PATH_TO_THE_DARK_SIDE = 'c:\winnt\system32'
+-----------------------------------------------------------