You could also more simply do
def youraction():
import cPickle
myobj = session.myobj and cPickle.loads(session.myobj)
.... use myobj ....
session.myobj=cPickle.dumps(myobj)
On May 13, 8:36 pm, lesh <[email protected]> wrote:
> Just to follow up on this topic...
>
> In order to remedy this problem storing objects in the session, I
> ended up writing an InlinePickler module:
>
> #Copyright (c) 2009 by Mark D. Lesh (www.marklesh.com)
> #All rights reserved.
> #
> #InlinePickler is Licensed under GPL version 2.0
> #<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
>
> import os
> import pickle
> from StringIO import StringIO
>
> class InlineUnpickler(pickle.Unpickler):
> """
> Usage:
>
> #To setup InlinePickler for TestClass:
> #import the InlinePickler.py module
> from applications.ApplicationName.modules import
> InlinePickler
>
> #Define your class with the following serialization
> methods
> class TestClass:
> def serialize(self):
> return InlinePickler.dumps(self)
>
> def deserialize(self,serialized_class):
> return InlinePickler.loads
> (serialized_class,self)
>
> def __init__(self):
> pass
>
> #To store TestClass instance to session:
> #create your object's name in the session
> session.test_obj={}
>
> #create your instance and populate it
> x = TestClass()
> x.list=['1','2','3']
>
> #store it by calling the instance's serialize method
> session.test_obj=x.serialize()
>
> #To retrieve the TestClass instance from the session
> #Instantiate the class, and call the deserialize
> method
> x= TestClass().deserialize(session.test_obj)
> """
>
> def set_custom_class_type(self,custom_class_type):
> self.custom_class_type=custom_class_type
>
> def load_global(self):
> self.append(self.custom_class_type)
>
> def find_class(self, module, name):
> if (self.custom_class_type!=None):
> return self.custom_class_type
> else:
> __import__(module)
> mod = sys.modules[module]
> klass = getattr(mod, name)
> return klass
>
> def loads(str,instance):
> file = StringIO(str)
> inline_pickle=InlineUnpickler(file)
> inline_pickle.set_custom_class_type(instance.__class__)
> return inline_pickle.load()
>
> def dumps(instance):
> return pickle.dumps(instance)
>
> On May 13, 1:24 am, mdipierro <[email protected]> wrote:
>
> > You cannot store your own classes in thesession. This is because
> > thesessionis retrieved automatically for you before your controller is
> > called and outside the scope where the function is defined.
>
> > This is a general problem with Python.
>
> > Try this:
> > import picke
> > class A: pass
> > pickle.dump(A(),open('afile.pickle','w'))
>
> > Then from a DIFFERENT program
> > import pickle
> > print pickle.load(open('afile.pickle','r))
>
> > the load will fail because class A is not define there.
>
> > Massimo
>
> > On May 13, 12:14 am,lesh<[email protected]> wrote:
>
> > > I am having difficulty storing a simple (non-SQL) object in the
> > >session. I wondered if anyone could give me a clue as to why. The
> > > following works:
>
> > > def update_profile():
> > > if (session.sections!=None):
> > > session.sections=None
> > > return dict(sections='spam')
> > > else:
> > > session.sections={}
> > > #x = testClass()
> > > x = 'eggs'
> > > session.sections=x
> > > return dict(sections=`x`)
>
> > > class testClass:
> > > pass
>
> > > with a toggling result on successive reloads of:
>
> > > ' e g g s '
> > > <<RELOAD THE PAGE>>
> > > s p a m
> > > ...
>
> > > However if I swap the two lines as below:
>
> > > def update_profile():
> > > if (session.sections!=None):
> > > session.sections=None
> > > return dict(sections='spam')
> > > else:
> > > session.sections={}
> > > x = testClass()
> > > #x = 'eggs'
> > > session.sections=x
> > > return dict(sections=`x`)
>
> > > class testClass:
> > > pass
>
> > > The result fails to toggle:
>
> > > <__b u i l t i n__.testClassinstanceat0xab18ccc>
> > > <<RELOAD THE PAGE>>
> > > <__b u i l t i n__.testClassinstanceat0xab094cc>
> > > ...
>
> > > Which appears that the object doesn't ever actually store into the
> > >session. I searched the group and from what I can tell this is
> > > possible, but I can't figure out what I'm doing wrong.
>
> > > Thanks in advance!
>
> > > --Lesh
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