[ZPatterns] AttributeError _v_cache

[Steve Spicklemire]

Hi Joachim,

	Hmm... this is in my Rack.py for TransactionAgents-0.4

     # Caching

     def _v_cache(self):
         self._v_Keeper
         l =3D self._v_cache =3D {}
         return l

     _v_cache =3D ComputedAttribute(_v_cache)

     __per_transaction_cache_attrs__ =3D ('_v_cache',)



I can't say I understand the code, but I probably should. (Hint: if you=20=

understand this deeply.. pitch in! ;-> ) However it *looks* like=20
_v_cache is actually defined *twice*. Once as a method of the class, and=20=

then as an attribute that is a "ComputedAttribute" wrapped version of=20
the original method. In any case, the attribute is clearly defined in=20
the class, so I can only guess that your instance is not using this=20
class definition. What version of ZPatterns are you using?

-steve

On Wednesday, October 17, 2001, at 10:07 AM, Joachim Schmitz wrote:

> Hi,
>
> I exported a Specialist, with storage in a MySQL db, and imported it=20=

> on a
> different zope server - same version 2.4.1, same ZPatterns. Installed=20=

> and
> filled the MySQL tables, and whenever I do some getItem, I get the=20
> Attribute
> error. I don't see any difference between the site, where I exportet=20=

> from,
> and where I imported to.
>
> the traceback is:
>
>  File
> /lib/python/DocumentTemplate/DT_Util.py,
> line 231, in eval
>     (Object: REQUEST.set('item',User.getItem(user_id)))
>     (Info: REQUEST)
>   File <string>, line 2, in f
>     (Object: guarded_getattr)
>   File
> /Products/ZPatterns/Specialists.py,
> line 34, in getItem
>     (Object: ProviderContainer)
>   File
> /Products/ZPatterns/Rack.py,
> line 56, in getItem
>     (Object: ProviderContainer)
>   File
> /Products/ZPatterns/Rack.py,
> line 259, in _fromCache
>     (Object: ProviderContainer)
> AttributeError: _v_cache
>
>
> Mit freundlichen Gr=FC=DFen
>
> Joachim Schmitz
>
> AixtraWare, Ing. B=FCro f=FCr Internetanwendungen
> H=FCsgenstr. 33a, D-52457 Aldenhoven
> Telefon: +49-2464-8851, FAX: +49-2464-905163
>
>
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