Django Library: Create Book with Author view

views.py

# views.py :: part 2

def create_book_with_authors(request):
    template_name = 'store/create_with_author.html'
    if request.method == 'GET':
        bookform = BookModelForm(request.GET or None)
        formset = AuthorFormset(queryset=Author.objects.none())
    elif request.method == 'POST':
        bookform = BookModelForm(request.POST)
        formset = AuthorFormset(request.POST)
        if bookform.is_valid() and formset.is_valid():
            # first save this book, as its reference will be used in `Author`
            book = bookform.save()
            for form in formset:
                # so that `book` instance can be attached.
                author = form.save(commit=False)
                author.book = book
                author.save()
            return redirect('store:book_list')
    return render(request, template_name, {
        'bookform': bookform,
        'formset': formset,
    })