[Zope] updating existing instances of a class

[John Schinnerer]

Hello,

I am trying to use the below code (from zopelabs) to update my existing
class instances.
When I run the python script to invoke the external method, I get an
Attribute error on REQUEST.
I have no idea why, or how to fix - and, I don't really understand the
first part of the external method that has references to REQUEST and
sets up the value of root.

Any help appreciated...

code/comments from zopelabs recipie is:
-------------
#create a file in $ZOPE/Extensions called schema.py
def addPropertyToObjectType(self, meta_type, property, prop_type=None):
    """ does a find for all meta_type's and then attaches this proeprty
to them if they dont already ahve it """
    root=None
    if self.REQUEST.has_key('VirtualRootPhysicalPath'):
        root = self.REQUEST.VirtualRootPhysicalPath
    else:
        root = ('',)
    root = self.restrictedTraverse(root)

    for result in self.ZopeFind(root, obj_metatypes=(meta_type, ),
search_sub=1):
        id, o = result[0], result[1]
        if not hasattr(o, property):
            setattr(o, property, prop_type)

#create a External Method id:addPropertyToMetaType
#module = schema.py and function = addPropertyToObjectType

#Now create a (Script)Python called add_body_text
context.addPropertyToMetaType('DTML Document', 'my_CustomProperty')
return 'fin'
--------------

thanks,
John S.


	
		
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