Is your new class completely custom, or did you derive it from an existing class (e.g., DTML Document)? Something that has worked for me in the past is to do a search on the set of objects... for obj in context.objectValues('MyClassMetaName'): .. and then use the base class addProperty method to add the additional property. You can also put a try/except block in your code to handle exceptions. Hope that helps. Ron

Hello,

I'm trying to add a new attribute to all objects of a certain meta_type on my site. These are objects that already exist and are already instantiated.

But, no matter how I go about it, I always end up with the same end result:

Error Type: TypeError Error Value: attribute-less object (assign or del)

I've treid using portal_catalog search results, and then something like : setattr(a,'newporperty',''), but that gives me the error above. I also tried o.property = '', but that didn't help ...

I also tried creating myobject = o.getObject() ... no go ...

Then I found some examples on various web sites that use ZopeFind to locate their objects ... tried that, still no luck.

What am I missing here? One thing, this is a custom object I added to the CMFDefault product, could that be part of the problem? This object otherwise works great within Zope and the CMF.

The traceback output varies depending on how I try to go about it, but here is the lastest one:

File Script (Python), line 14, in addPropertyToObjectType (Object: english) File /usr/local/Zope-2.5.0/lib/python/RestrictedPython/Guards.py, line 107, in guarded_setattr (Object: density) File /usr/local/Zope-2.5.0/lib/python/RestrictedPython/Guards.py, line 72, in handler

"English" is a Portal Folder, "density" is one of my custom objects ....

Help ?

Thanks in advance,

J.F.

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