-----Original Message----- From: Tom Deprez <tom.deprez@uz.kuleuven.ac.be> To: Rik Hoekstra <rik.hoekstra@inghist.nl> Date: donderdag 30 maart 2000 13:46 Subject: Re: [Zope] External Method 3

Thanks Rik,

However, I think this solution is some sort of the same 'patch' I use. i.e. It isn't error-less. I find it strange that there is not a way to know if an object has got parents or not. There should be a way.

Sorry, Tom, I was blabbering last time about hasattr. The right solution is of course: def recursiveMethod(self, obj, result): if hasattr(obj, aq_parent): result.append(obj.title) recursiveMethod(self, obj.aq_parent, result) return result which you will have to call like this (assuming you external method in Zope is called recursiveMethod): <dtml-var "recursiveMethod(<obj>, [])"> Working with a keyword argument didn't work for me. I'm sure someone can explain you why (but I don't have time for sorting that out right now)

PS. I believe you once wrote that people ask you to write a book on zope. Is there a possible way to know which publisher asked you? I received also a request last week, but I don't even think on starting (don't know even if I will do it anyway) when the same publisher asked you it already.

Nope, no such requests on my part. I think you may be confusing me with Martijn Faassen (?) Rik