[Zope] __bobo_traverse__ or similiar with python tales expression?

[Sebastian Tänzer]

Hello fellow Zopees,

the product we’re using (ZMS) allows methods as attributes to custom object 
models. These methodes (PythonScript) are created inside a metamanager 
container as „Wiki.mymethod“, where Wiki is the meta type of the custom object.

The pathhandler method of these custom objects modifies __bobo_traversal__ for 
normal http requests and maps these non-existing methods in that context to 
existing methods in the metaobj_manager container using the context meta_id.

Calling the same method from a PageTemplate or other PythonScript does not 
reflect that and - not surprisingly - returns an AttributeError:

File 
/opt/python/zope2-pip/lib/python2.7/site-packages/Products/PageTemplates/ZRPythonExpr.py,
 line 
48, in __call__
return eval(self._code, vars, {})
  File PythonExpr, line 1, in expression
AttributeError: dummyFunction

Is there a way to modify traversal behaviour from the Product or somehow 
different?

Best
Sebastian
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