python - Creating one Django Form to save two models -

i have regular django user model , userdetails model (onetoonefield user), serves extension user model. (i tried django 1.5's feature , headache strangely horrible documentation, stuck onetoonefield option)

so, in quest build custom registration page have registration form comprised of user fields , userdetails fields, wondered if there way generate form automatically (with of validations) out of these 2 related models. know works form made of 1 model:

class meta:     model = mymodel 

but there anyway similar functionality form comprised of 2 related models?

from django.forms.models import model_to_dict, fields_for_model   class userdetailsform(modelform):     def __init__(self, instance=none, *args, **kwargs):         _fields = ('first_name', 'last_name', 'email',)         _initial = model_to_dict(instance.user, _fields) if instance not none else {}         super(userdetailsform, self).__init__(initial=_initial, instance=instance, *args, **kwargs)         self.fields.update(fields_for_model(user, _fields))      class meta:         model = userdetails         exclude = ('user',)      def save(self, *args, **kwargs):         u = self.instance.user         u.first_name = self.cleaned_data['first_name']         u.last_name = self.cleaned_data['last_name']         u.email = self.cleaned_data['email']         u.save()         profile = super(userdetailsform, self).save(*args,**kwargs)         return profile