Whilst setting up a new machine for development I took down the latest development version of Django (7825). I am now experiencing a Pickle error when running my existing application which has been working fine on our production servers for a few months. The error occurs when using the Cache.set function and passing a queryset for the purposes of caching. It also does the same in anaother view where we're passing a queryset into the Cache.set
I've checked the backward compatibility changes and cannot see anything that would directly relate to it. I note that there was a fix implented at 7773 - http://code.djangoproject.com/ticket/7506, but I'm not sure if it is relevant. Has anyone encountered this recently, or can anyone shed some light on it and suggest a work round, or does it need a ticket? The code that causes this in the view is: comp=Compfile.objects.filter(campaign=campaign).select_related().order_by("rank") for i in comp: my_id=i.competition.id strapline=i.competition.strapline setattr(i,"my_id",my_id) setattr(i,"strapline",strapline) data={'comp':comp} cache.set(cache_name,data,cache_time) Traceback from the error is as follows: Environment: Request Method: GET Request URL: http://localhost/hive/competitions_ver2/ Django Version: 0.97-pre-SVN-7825 Python Version: 2.5.2 Installed Applications: ['django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.admin', 'django.contrib.humanize', 'hive.promotions', 'voting'] Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.doc.XViewMiddleware') Traceback: File "C:\Python25\Lib\site-packages\django-trunk\django\core\handlers \base.py" in get_response 82. response = callback(request, *callback_args, **callback_kwargs) File "C:/DATA/PROJECTS/hive\promotions\views.py" in display_competitions_ver2 6712. cache.set(cache_name,data,cache_time) File "C:\Python25\Lib\site-packages\django-trunk\django\core\cache \backends\db.py" in set 41. return self._base_set('set', key, value, timeout) File "C:\Python25\Lib\site-packages\django-trunk\django\core\cache \backends\db.py" in _base_set 56. encoded = base64.encodestring(pickle.dumps(value, 2)).strip() Exception Type: PicklingError at /hive/competitions_ver2/ Exception Value: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
