modelformset partial save and AttributeErrors

Hi, I'm getting the following error when I try to assign a value to a
model attribute in a modelformset:

AttributeError at /number/
'WSGIRequest' object has no attribute 'qsession'

which occurs in the following snippet:

numbers = formset.save(commit=False)
for number in numbers:
number.qsession = request.qsession
number.save()

If I dir(number) I can see qsession as an attribute, which is
puzzling. I'm really bad at this stuff, so I'll put all the relevant
code below. Any help appreciated.

Here are the models:

class QuestionnaireSession(models.Model):
user = models.ForeignKey(User,blank=True,null=True)
name = models.CharField(max_length=100,blank=True,null=True)

class Number(models.Model):
qsession = models.ForeignKey(QuestionnaireSession)
name = models.CharField(max_length=100)
supertype = models.ForeignKey('self',blank=True,null=True)

And the formset:

NumberFormSet = modelformset_factory(Number, exclude=('qsession',))

And the relevant views.py code:

def get_qsession(request):
if 'qsession' not in request.session:
qsession = QuestionnaireSession()
qsession.save()
request.session['qsession'] = qsession
else:
qsession = request.session['qsession']
return qsession

def number(request):
qsession = get_qsession(request)
queryset = Number.objects.filter(qsession=qsession)
if request.method == 'POST': # form was submitted
formset = NumberFormSet(request.POST, queryset=queryset)
if formset.is_valid():
numbers = formset.save(commit=False)
for number in numbers:
number.qsession = request.qsession
number.save()
return HttpResponseRedirect('/top/')
else:
formset = NumberFormSet(queryset=queryset)
return render_to_response('questionnaire/questionnaire.html',
{'numberformset': formset},

context_instance=RequestContext(request))

Thank you

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