[Zope] External Method 3

[Tom Deprez]

Hi Rik,

Forget my previous message, I got it working now with hasattr. I made a
mistake myself when trying this code out.

Tom.

At 11:35 31/03/2000 +0200, Rik Hoekstra wrote:
>
>
>Tom Deprez wrote:
>> 
>> >> Well, the external method is defined in a ZClass and a catalog uses
it to
>> >> index the result. When I use the hasattr() I receive nothing (not
even an
>> >> empty list). If I use the split() method, then I receive a list with all
>> >> the names.
>> >
>> >Yes, that's because the split does something else.
>> >Don't know if you want to pursue this further, but if so, let's try and
>> >track it down
>> 
>> Well, normally it should always give me an empty list as result. Because I
>> initialize the result with []. With hasattr() I receive nothing. This means
>> that some error must happened (I figured this out with all my other
>> mistakes) :-). However which error? How to find the error?
>> 
>
>Hm
>
>> >How do you call it from dtml?
>> 
>> I don't call it from dtml. The external method is a method of the ZClass
>> itself. I index it in a Catalog. So no dtml calling from my point.
>
>Ah, so I understand that it's not called with arguments. So you need
>another external method.
>Change you external method to look like this
>
>def recursiveMethod(obj, result):
>     if hasattr(obj, 'aq_parent'):
>          result.append(obj.title)
>          recursiveMethod(obj.aq_parent, result)
>     return result
>
>
>def ParentList(self):
>    obj=self
>    return recursiveMethod(obj, [])
>
>Then make you external method refer to ParentList
>This works without arguments from a testfolder. It should work from a
>ZClass as well, but I did not test that.
>
>
>> >If there is a traceback, it will show in the same way as normally, I
>> >believe.
>> 
>> I don't know. I test it with a search on the catalog. I ask to show me all
>> 'KBItem' types. It then shows all the values of the attributes of the
KBItems.
>> The values of the method are empty with hassattr().
>> 
>
>Ok, see if the above works then.
>
>Rik
>
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