A form/view combo to create linked objects

example.py

# models.py
from django.db import models

class Foo(models.Model):
    pass


class Bar(models.Model):
    foo = models.ForeignKey(Foo)


# forms.py
from django import forms
from example.models import Bar

class BarForm(forms.ModelForm):
    class Meta:
        model = Bar
        exclude = ['foo']
    
    def __init__(self, *args, **kwargs):
        self.foo = kwargs.pop('foo')
        super(BarForm, self).__init__(*args, **kwargs)
    
    def save(self, commit=True):
        bar = super(BarForm, self).save(commit=False)
        bar.foo = self.foo
        if commit:
            bar.save()
        return bar


#views.py
from django.views.generic import CreateView
from django.shortcuts import get_object_or_404
from example.models import Foo, Bar
from example.forms import BarForm

class BarCreateView(CreateView):
    model = Bar
    form_class = BarForm
    
    def dispatch(self, request, *args, **kwargs):
        self.foo = get_object_or_404(Foo, pk=kwargs['foo_pk'])
        return super(BarCreateView, self).dispatch(request, *args, **kwargs)
    
    def get_form_kwargs(self):
        kwargs = super(BarCreateView, self).get_form_kwargs()
        kwargs['foo'] = self.foo
        return kwargs