[ZODB-Dev] can't undo with FileStorage and ZEO

[Andrew Sydelko]

Jim Fulton wrote:
> Andrew Sydelko wrote:
> > 
> > Jim Fulton wrote:
> > > The Zope App package (or just App.Undo) must be in the Python path of the storage server.
> > 
> > Umm... I believe it is.
> 
> Please double check that.
> 
> > And it's not saying that
> > it can't find the module App.Undo,
> > it's complaining
> > about the "global Prefix" in the module App.Undo.
> 
> The message says it couldn't get it. It could not get it because
> it couldn't find the module or because the Prefix class isn't in the
> module. The only the later is true is that you modified the module.
> 
> Note that the Undo module imports other things. Maybe your missing one
> of those.
> 
> 
> > 
> > Any way to check that it is in the python path of the
> > server?
> 
> See if you can undo. ;) Sorry.
> How about modifying the server to print the PYTHONPATH
> environment variable.

with print sys.path in Zope/lib/python/ZEO/start.py I get this:

['Zope/lib/python', 'Zope/lib/python/ZEO', '/data/www/Zope.6/lib/python2.1', '/data/www/Zope.6/lib/python2.1/plat-sunos5', '/data/www/Zope.6/lib/python2.1/lib-tk', '/data/www/Zope.6/lib/python2.1/lib-dynload', '/data/www/Zope.6/lib/python2.1/site-packages']

So, yes, App.Undo is in my PYTHONPATH (it's the first entry above)

There is no initial PYTHONPATH set when starting the ZEO server.

In Zope/lib/python/App/Undo.py is the following:

201: Globals.default__class_init__(UndoSupport)
202: 
203: 
204: class Prefix:
205: 
206:     __no_side_effects__=1
207: 
208:     def __init__(self, path):
209:         self.value = len(path), path
210: 
211:     def __cmp__(self, o):
212:         l,v = self.value
213:         rval = cmp(o[:l],v)
214:         return rval

It seems like it might be complaining about this stuff but
it's all black voodoo magic to me.

--andy.