author_create_edit_view.py

# URLs:
# url('new/$', author_edit, name='author_new')
# url('(?P<author_id>\d+)/$', author_edit, name='author_edit')



def author_edit(request, author_id=None):
    author = None

    if author_id:
        author = Author.objects.get(pk=author_id)

    if request.POST:
        form = AuthorForm(request.POST, instance=author)

        if form.is_valid():
            form.save()

            return redirect('author_list')

    else:
        form = AuthorForm(instance=author)

    return render(request, 'author_edit.html', {'form': form})