placing request.POST.copy() in session wipes all session values

[mikechambers]

Version : (0, 97, 'pre')

The issue is that it appears trying to store a QueryDict (request.POST, or a copy of a QueryDict) in the session, will wipe all session data.

You can see the original thread here:

​http://groups.google.com/group/django-users/browse_thread/thread/260d9b94f773655e

Basically:

request.session['form_post_data'] = request.POST.copy()
request.session['foo'] = "bar"

Then, in another request:

print request.session.keys()

prints []

(i.e. no keys)

But:

request.session['foo'] = "bar"

then in another request:

print request.session.keys()
prints ['foo']

There seems to be two potential issues:

1. Cannot store request.POST.copy() or request.POST in the session (should you be able to do this?)
2. Trying to place request.POST.copy() in the session wipes all session values.

More info on the following threads:

​http://groups.google.com/group/django-users/browse_thread/thread/260d9b94f773655e

and

​http://groups.google.com/group/django-developers/browse_thread/thread/ec651a3b5f877698

[mikechambers]

test project that reproduces issue

[rajesh.dhawan@…]

Fix to make copies of QueryDict instances pickle/unpickle friendly