[Zope-dev] Proxy Object / __getattr__ / Acquisition

[Dieter Maurer]

sean.upton@uniontrib.com writes:
 > ....
 > I am using __getattr__ within my product, and the code
 > pasted below works ...
 > However, because of the way that this
 > messes with Acquisition, certain things like accessing the ZMI pages or
 > acquired methods can be quite slow (but work).
 > ...
 >         def __getattr__(self, name):
 >                 return getattr(self._CurrentVersion, name)
I am (almost) sure, you run into the same problem than I did
and reported to <mailto:zpt@zope.org>.

  You get an infinite "__getattr__" loop, broken via
  a "RuntimeError, maximal recursion exceeded" which is silently
  ignored.

Use

	def __getattr__(self,name):
	    # avoid acquisition
	    current= self.__dict__['_CurrentVersion']
	    if hasattr(current,name):
	       return getattr(self._CurrentVersion,name)

More info in the ZPT mailing list archives.


Dieter