Re: zope.session storage error

You solved my problem.

After correcting the idiomatic errors and storing the customer ID only, the
error doesn't appear anymore.

Do you have please an explanation ?

Regards
Simon Elbaz

On Tue, Oct 14, 2014 at 1:21 PM, Marius Gedminas <[email protected]> wrote:

> On Tue, Oct 14, 2014 at 12:13:56AM +0200, Simon Elbaz wrote:
> > Hi,
> >
> > Could someone explain me why the following code:
> >
> >     if
> ISession(self.request)['cdc_adama'].__contains__('current_customer'):
> >
>  ISession(self.request)['cdc_adama'].__delitem__('current_customer')
> >     ISession(self.request)['cdc_adama']['current_customer'] = customer
>
> First, a style issue: please don't use __contains__ or __delitem__ this
> way.  Use the idiomatic Python spelling:
>
>     if 'current_customer' in ISession(self.request)['cdc_adama']:
>         del ISession(self.request)['cdc_adama']['current_customer']
>     ISession(self.request)['cdc_adama']['current_customer'] = customer
>
> > triggers the error:
> >
> >   File
> >
> "/home/simon/ADAMA/Src/gui/z3c_dunning/eggs/ZODB-4.0.0a4-py2.7.egg/ZODB/serialize.py",
> > line 352, in persistent_id
> >     "database connection", self._jar, obj,
> > InvalidObjectReference: ('Attempt to store an object from a foreign
> > database connection', <Connection at 7966348c>,
> > <zope.container.btree.BTreeContainer object at 0x7a61282c>)
> >
> > Is the zope.session module opening a new ZODB connection ?
>
> It's not about different ZODB connections.  It's about objects being
> stored in different databases.  And that depends on how your session
> storage is configured in your application.  For example, if you use
> RAMSessionDataContainer then session data lives in a memory-only
> MappingStorage.
>
> Perhaps you can store just the customer ID instead of the entire object?
>
> Regards,
> Marius Gedminas
> --
> http://pov.lt/ -- Zope 3/BlueBream consulting and development
>
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