User has no dcf_profile : RelatedObjectDoesNotExist - django

Question

After extending an existing user model, I get RelatedObjectDoesNotExist exception with a value User has no dcf_profile. I seems that dcf_profile isn't created automatically for each user.
Please take a look at my model, view and form below and tell me how can I correct my views file?
My models.py :
class CustomUser(models.Model):
auth_user_ptr = models.OneToOneField(
User,
parent_link=True,
related_name='dcf_profile',
primary_key=True
)
phone = models.CharField(_('phone'), max_length=30, null=True, blank=True)
receive_news = models.BooleanField(_('receive news'), default=True, db_index=True)
class Meta:
app_label = 'dcf'
def allow_add_item(self):
if self.item_set.count() > settings.DCF_ITEM_PER_USER_LIMIT:
return False
else:
return True
class Item(models.Model):
slug = models.SlugField(blank=True, null=True, max_length=100)
user = models.ForeignKey(User, on_delete=models.CASCADE)
group = models.ForeignKey(Group, verbose_name=_('group'))
title = models.CharField(_('title'), max_length=100)
description = models.TextField(_('description'))
price = models.DecimalField(_('price'), max_digits=10, decimal_places=2)
phone = models.CharField(_('phone'), max_length=30)
is_active = models.BooleanField(_('display'), default=True, db_index=True)
updated = models.DateTimeField(_('updated'), auto_now=True, db_index=True)
posted = models.DateTimeField(_('posted'), auto_now_add=True)
def __unicode__(self):
return self.title
class Meta:
verbose_name = _('item')
verbose_name_plural = _('items')
ordering = ('-updated', )
def get_absolute_url(self):
return reverse('item', kwargs={
'pk': self.pk,
'slug': self.slug
})
def get_title(self):
return u'%s' % self.title
def get_description(self):
return u'%s' % self.description[:155]
def get_keywords(self):
# TODO need more optimal keywords selection
return ",".join(set(self.description.split()))
def get_related(self):
# TODO Need more complicated related select
return Item.objects.exclude(pk=self.pk)[:settings.DCF_RELATED_LIMIT]
def save(self, *args, **kwargs):
if self.slug is None:
self.slug = slugify(unidecode(self.title))
super(Item, self).save(*args, **kwargs)
My views.py :
class ItemCreateView(FormsetMixin, CreateView):
is_update_view = False
model = Item
form_class = ItemCreateEditForm
formset_class = inlineformset_factory(Item, Image, extra=3, fields=('file', ))
#method_decorator(login_required)
def dispatch(self, *args, **kwargs):
if not self.request.user.dcf_profile.allow_add_item():
messages.error(self.request, _('You have reached the limit!'))
return redirect(reverse('my'))
return super(ItemCreateView, self).dispatch(*args, **kwargs)
def form_valid(self, form, formset):
form.instance.user = self.request.user
form.save()
return super(ItemCreateView, self).form_valid(form, formset)
My forms.py
class ItemCreateEditForm(forms.ModelForm):
class Meta:
model = Item
fields = ('group', 'title', 'description', 'price', 'phone', 'is_active')

Answer 1

Just to share with you a solution that worked, I have created a proxy model of the User model and updated my views.py :
Updated models.py
class DcfUser(User):
class Meta:
proxy = True
def allow_add_item(self):
if self.item_set.count() > settings.DCF_ITEM_PER_USER_LIMIT:
return False
else:
return True
Updated views.py
#method_decorator(login_required)
def dispatch(self, *args, **kwargs):
user = self.request.user
my_user = DcfUser.objects.get(username=user)
if not my_user.allow_add_item():
messages.error(self.request, _('You have reached the limit!'))
return redirect(reverse('my'))
Thank you