#settings.py
AUTH_PROFILE_MODULE = 'client.Client'
LOGIN_REDIRECT_URL = '/acces-client/'
LOGIN_URL = '/acces-client/login/'
LOGOUT_URL = '/acces-client/logout/'

#models.py
#-*- encoding: utf-8 -*-

#Import Django
from django.db import models
from django.contrib.auth.models import User
from django.contrib.localflavor.ch import ch_states
from django.utils.translation import ugettext as _


class Client(models.Model):
    """
        Model pour la base de donnée des clients
    """
    user = models.ForeignKey(User)
    company = models.CharField(max_length=512, verbose_name=_(u"Société"), blank=True)
    adress = models.CharField(max_length=512, verbose_name=_(u"Adresse *"))
    zipcode = models.IntegerField(max_length=4, verbose_name=_(u"Code postal *"))
    city = models.CharField(max_length=128, verbose_name=_(u"Ville *"))
    website = models.URLField(verbose_name=_(u"Site internet"), blank=True)
    phone = models.CharField(max_length=128, verbose_name=_(u"Téléphone *"))
    mobile = models.CharField(max_length=128, verbose_name=_(u"Natel"), blank=True)
    fax = models.CharField(max_length=128, verbose_name=_(u"fax"), blank=True)

    def __unicode__(self):
        return self.user


#forms.py
class informationsForm(forms.Form):
    """
        Formulaire d'information sur l'utilisateur
    """
    email = forms.EmailField(label=_(u"Email*"))
    password = forms.CharField(widget=forms.PasswordInput, label=_("Mot de passe*"),)
    password2 = forms.CharField(widget=forms.PasswordInput, label=_("Confirmation du mot de passe*"))
    lastname = forms.CharField(max_length=100, label=_(u"Nom*"))
    firstname = forms.CharField(max_length=100, label=_(u"Prénom*"))
    zipcode = CHZipCodeField(label=_(u"Code postal*"))
    city = forms.CharField(widget=CHStateSelect)
    phone = CHPhoneNumberField(label=_(u"Téléphone*"))
    mobile = CHPhoneNumberField(label=_(u"Natel"), required=False)
    fax = CHPhoneNumberField(label=_(u"Fax"), required=False)

#views.py
@login_required
def informations(request, template_name):
    if request.method == 'POST':
        form = informationsForm(request.POST)
        if form.is_valid():
            user = request.user
            # we take the field names of the user to use them to extract information from the form
            user_fields = fields_for_model(user).keys()
            # we create a dictionary with the data that belongs to the user
            new_data = dict((field, form.cleaned_data.pop(field)) for field in user_fields)
            form.cleaned_data['email']
            form.cleaned_data['password']
            form.cleaned_data['lastname']
            form.cleaned_data['firstname']
            form.cleaned_data['zipcode']
            form.cleaned_data['city']
            form.cleaned_data['phone']
            form.cleaned_data['mobile']
            form.cleaned_data['fax']
            # we set the new data on the user
            for field in new_data:
                setattr(user, field, new_data[field])
                user.save()
                return redirect('client_informations')
    else:
        user = request.user
        infosUser = model_to_dict(user)
        try:
            client = user.client_set.get()
        except Client.DoesNotExist: #he return an except error
            client = None
            print "coucou"
        infosClient = model_to_dict(client)
        infosUser.update(infosClient) #I want to get the data of profil
        infosForm = informationsForm(initial=infosUser)
        return render_to_response(template_name, { "forms": infosForm }, context_instance = RequestContext(request))


#error:
in the information -> he go to except and i've this error:
'NoneType' object has no attribute '_meta'

I want the form view the username, email, password from django.contrib.auth user and the informations of my models