[Zope] problem with acquisition

[John Hunter]

I have a zope containment hierarchy

  base/somefolder/myobj
  base/other

base, somefolder, myobj, and other are all instances of a MyFolder
class which is derived from Folder.  MyFolder is a simple extension of
Folder that limits the allowed meta classes.

I would like to acquire the 'other' folder from a myobj instance using
the python API.  Ie, I have a class method in which I need to be able
to do

  def somemethod(self, someinstance):
       otherFolder = acquisition_magic(someinstance, 'other')

where I know someinstance is a MyFolder instance which is either base
itself, is contained in base (possibly deep in the tree).  Ie, I would
like this method to work if someinstance is one of base, somefolder,
or myobj.

Since all of these instances derive from Acquisition.Implicit via
ObjectManager, I think I should be able to do this.


I thought from Acquisition import aq_get, aq_acquire, aq_parent

  def somemethod(self, someinstance):
      folder = aq_acquire(someinstance, 'other')

would do it for me, but this raises an AttributeError when passed a
myobj instance.

Thanks!
JDH

zope 2.7