Python – Django CreateView with foreign key fields

I want to add a phone number to a person.

My models.py contains:

class Person(models. Model):
    first_name = models. CharField(max_length=64)
    last_name = models. CharField(max_length=64)
    description = models. CharField(max_length=64)

class Phone(models. Model):
    CHOICES = (
        ('P', 'personal'),
        ('C', 'company')
    )
    person = models. ForeignKey(Person)
    number = models. CharField(max_length=20, unique=True)
    type = models. CharField(max_length=1, choices=CHOICES)

My views.py contains:

class PersonCreate(CreateView):
    model = Person
    fields = ['first_name', 'last_name', 'description']

class PhoneCreate(CreateView):
    model = Phone
    fields = '__all__'

My urls.py contains:

url(r'^(? P<pk>\d+)/$', PersonDetailView.as_view(), name = 'detail'),
url(r'^(? P<pk>\d+)/addPhone$', PhoneCreate.as_view(), 
     name='phone_create')

Now it works like this:
I’m going into the Person Details View (url: “Details”). Here I have an Add Address button that redirects me to view (url: ‘phone_create’), but I still have to select people. How do I automatically create a contact’s phone number from a detailed view?

I found the right answer:

class PhoneCreate(CreateView):
    model = Phone
    fields = ['number', 'type']

def form_valid(self, form):
        form.instance.person_id = self.kwargs.get('pk')
        return super(PhoneCreate, self).form_valid(form)