[Zope] zForum problem

burley at zonnet.nl burley at zonnet.nl
Wed Mar 23 11:44:44 EST 2005 

I'm using CookieCrumbler.py 1.18.10.1 from CMFPlone-2.0-final (I'm using Plone
indeed, yet at a lower level in the folder hierarch).
The error pops up just once for each of many attempts.
Also you say "...CookieCrumbler folder have read permission for the zope
user." I can't see the CookieCrumbler object is a folder (when I clikc it it's
just a "Cookie Crumbler" object with some properties).
However, in the zForum instance creation form when I switch off the checker
box for "Create user folder" I get past the previous error (at line 142 in
zForum.py). Instead, I obtain the following error message:

"""
Site Error

An error was encountered while publishing this resource.

Error Type: UnboundLocalError
Error Value: local variable 'files_dir' referenced before assignment
"""

with traceback in the Error Log file:

"""
Time  	2005/03/23 17:27:33.398 GMT+1
User Name (User Id) 	zope (zope)
Request URL 	http://localhost:8080/manage_addProduct/zForum/manage_addZForum
Exception Type 	UnboundLocalError
Exception Value 	local variable 'files_dir' referenced .
before assignment

Traceback (innermost last):

    * Module ZPublisher.Publish, line 101, in publish
    * Module ZPublisher.mapply, line 88, in mapply
    * Module ZPublisher.Publish, line 39, in call_object
    * Module Products.zForum.zForum, line 87, in manage_addZForum
    * Module Products.zForum.zForum, line 116, in __init__
    * Module Products.zForum.zForum, line 173, in zfSetupSystem

UnboundLocalError: local variable 'files_dir' referenced before assignment
"""
Around line 173 the zfSetupSystem method (in zForum) reads:
...
for k in [INSTANCE_HOME, SOFTWARE_HOME]:
      location = os.path.join(k, 'Products', 'zForum', 'www', 'forum_main')
      if os.path.exists(location):
         files_dir = location
for file in os.listdir(files_dir):                         # line 173
...

Apparently, in my session "os.path.exists(location)" evaluates to false,
files_dir becomes undefined (it's not defined before) yielding the runtime
error at 173. To me this looks like a bug...

As regards my problem, I can conclude that zForum creation seems to get past
the manage_addCC method when no user folder is created. What can we learn from
this. ...?

Citeren Cliff Ford <Cliff.Ford at ed.ac.uk>:

> OK - I am stumped! I have just created a zForum in my root folder 
> without a hitch. The problem is nothing to do with the root folder 
> acl_users folder or the database connection. It has to be something to 
> do with CookieCrumbler. Check you only have one installed (I assume you 
> are not using Plone). Check the version - mine is CookieCrumbler-1.2. 
> Have a look in __init__.py and CookieCrumbler.py to check they both have 
> manage_addCC references (i.e. have not been corrupted). Check that files 
> in the CookieCrumbler folder have read permission for the zope user.
> 
> You say the error keeps popping up again and again. Do you mean it pops 
> up many times during one installation attempt, or just once for each of 
> many attempts?
> 
> I this doesn't help you will need help from zForum or CookieCrumbler 
> experts. Did you try not checking the Create user folder checkbox? That 
> leaves out creation of acl_users so may not bother with the addCC call.
> 
> Cliff
> 
> H Jansen wrote:
> > I've gone through your details, yet I'm still stuck ;-( :
> > 
> > Cookie Crumbler is in the 'Add dropdown' list. Further, I try to keep
> > things simple as possible: zForum creation in root folder ("/"), single
> > acl_user ('zope', who is the Manager and by default has all permissions
> > including read/write permissions.); these all are aquired by
> > CookieCrumbler, zForum folders however do not exist at this stage since
> > zForum doesn't get past its instantiation. The error message:
> > 
> > 
> >>>>"""
> >>>>Site ErrorAn error was encountered while publishing this resource.
> >>>>
> >>>>Error Type: AttributeError
> >>>>Error Value: manage_addCC
> >>>>"""
> > 
> > 
> > keeps popping up again and again. The zope manager's password in
> acl_users is
> > different from that used in the database connection string; that can't be
> the
> > problem can it...?
> > 
> > 
> > On Wed, 2005-03-23 at 15:05, Cliff Ford wrote:
> > 
> >>Forgot to cc the list in the last reply. Line 142 of zForum.py says:
> >>
> >>CookieCrumbler.manage_addCC('cookie_authentication')
> >>
> >>and the error message is saying that it can't find manage_addCC in 
> >>CookieCrumbler (I have taken out the rest of the Error log from this 
> >>reply because it contained a plain text database connection string).
> >>
> >>Check that your Add dropdown list has Cookie Crumbler (Standalone) in 
> >>its list and that the Zope user has read/write access to the 
> >>CookieCrumbler and zForum folders.
> >>
> >>I have a test zForum installed and it just worked! If I create another 
> >>with a dud database connection string I get a database error when trying
> 
> >>to View (the installation appeared to work OK).
> >>
> >>Cliff
> >>
> >>H Jansen wrote:
> >>
> >>>Yep, that works. Here we go:
> >>>
> >>>Exception traceback
> >>>
> >>>Time
> >>>2005/03/23 14:08:12.432 GMT+1
> >>>User Name (User Id)
> >>>zope (zope)
> >>>Request URL
> >>>http://localhost:8080/mfts.nl/manage_addProduct/zForum/manage_addZForum
> >>>Exception Type
> >>>AttributeError
> >>>Exception Value
> >>>manage_addCC
> >>>
> >>>Traceback (innermost last):
> >>>
> >>>      * Module ZPublisher.Publish, line 101, in publish
> >>>      * Module ZPublisher.mapply, line 88, in mapply
> >>>      * Module ZPublisher.Publish, line 39, in call_object
> >>>      * Module Products.zForum.zForum, line 87, in manage_addZForum
> >>>      * Module Products.zForum.zForum, line 116, in __init__
> >>>      * Module Products.zForum.zForum, line 142, in zfSetupSystem
> >>>AttributeError: manage_addCC 
> >>>
> >>>
> >>
> >>... snip ...
> >>
> >>
> >>>On Wed, 2005-03-23 at 12:04, Cliff Ford wrote:
> >>>
> >>>
> >>>>Look at the Error Log for the Traceback, which tells you exactly where
> 
> >>>>the error occurred. That can often help pinpoint the problem by module
> 
> >>>>and line number - look at the Product code if necessary. Include the 
> >>>>Traceback in any question to the mailing list.
> >>>>
> >>>>Cliff
> >>>>
> >>>>burley at zonnet.nl wrote:
> >>>>
> >>>>
> >>>>>I've problems getting the zForum product working. When I try to create
> azForum
> >>>>>instance somewhere in my Zope site, I invariably obtain the
> errormessage:
> >>>>>
> >>>>>"""
> >>>>>Site ErrorAn error was encountered while publishing this resource.
> >>>>>
> >>>>>Error Type: AttributeError
> >>>>>Error Value: manage_addCC
> >>>>>"""
> >>>>>Looking for a solution on the internet, the closest I could get was
> >>>>>asdescribed in http://www.pcfltd.co.uk/docs/zforum.html (which is
> >>>>>aboutinstallation on a Windows machine; I'm working on Linux box).
> >>>>>
> >>>>>In the directory where I want to create the zForum:
> >>>>>1) I do have a database connection which is open en tested (works).
> >>>>>2) I do have a CookieCrumbler instance (which I'm not sure of
> whetherit's
> >>>>>essential or not...); the CookieCrubler properties are unchanged...
> (i.e.
> >>>>>__ac, __ac_name, __ac_password, etc)
> >>>>>3) In the zForum instance form I use the same connection string
> asdefined in
> >>>>>the database connection.
> >>>>>
> >>>>>The Site Error message keeps popping up all the time (...sigh).
> >>>>>Anyone some idea what's wrong...?
> >>>>>
> >>>>>
> >>
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