[Zope-dev] zc.relationship - can't pickle module objects

[Martin Aspeli]

Martin Aspeli wrote:
> Gary Poster wrote:
>> On Mar 16, 2009, at 4:02 AM, Martin Aspeli wrote:
>>
>>> Hi,
>>>
>>> I *think* this is a bug in zc.relationship, but I'm not quite sure.
>>>
>>> I'm using ZODB3 3.8.1 (to get BLOB support) and trying to install
>>> plone.app.relations, which depends on zc.relationship 1.0.2. In
>>> particular, it  subclasses zc.relationship.shared.Container, and  
>>> stores
>>> a zc.relationship.index.Index object in self.relationIndex.
>>>
>>> Now, the __init__ of zc.relationship.index.Index, which derives from
>>> Persistent, contains the code below. In self._relTools and and
>>> self._attrs, there are a pile of modules, types and functions being
>>> stored. I think these are causing the ZODB to barf. Interestingly,  
>>> with
>>> whatever version of ZODB that comes with Zope 2.10 (3.7?), there's no
>>> problem.
>>>
>>> Any ideas how to work around this, or even why it's a problem in one
>>> version of the ZODB but not another?
>> No idea yet.  What's the barf's traceback?
> 
> Mmmm... it seems that zc.relationship 1.1 fixes the issue, but has some 
> other problems (an undefined variable minValues or similar - I haven't 
> got a build with this version in it right now); 2.0dev seems better, 
> albeit a bit scary at pre-alpha. Also, I think 2.0dev *requires* ZODB 
> 3.8, though, which means we have to choose one or the other. Ideally, 
> I'd like a version of plone.relations that works with both ZODB 2.7 and 2.8.

I meant ZODB 3.7 and 3.8, of course. :)

Martin

-- 
Author of `Professional Plone Development`, a book for developers who
want to work with Plone. See http://martinaspeli.net/plone-book