reuse of views in django

Question

I am creating a django site where I use an OTP (one time password) to validate user data when logging in. So I have a view in which I manage the login and one that emails the otp, provides the form, checks that the otp is correct and redirects the user to the homepage. Now I would like to reuse the otp view in other situations as well (e.g. password change or recovery). How can I use a view as if it were a normal function, in the sense of calling it from within another view, rendering a template and returning a value to the calling view?
Thanks in advance

Answer 1

Make it a decorator. E.g. the @login_required decorator you may have used is backed by user_passes_test(); your @otp_required decorator could have more logic and only defer to the original view function once your OTP magic passes.

Something like this, as semi-pseudocode. There's no special magic to it, really – the view function decorator simply wraps the view, so it can do whatever a view can.

from functools import wraps


class OtpView(views.FormView):
    pass


def requires_otp(view_func):
    @wraps(view_func)
    def _wrapped_view(request, *args, **kwargs):
        if not has_valid_otp_for_request(request):
            return OtpView.as_view()(request)
        return view_func(request, *args, **kwargs)
    return _wrapped_view

# ...

@requires_otp
def my_view(...):
   pass

# or for CBVs:

... requires_otp(MyView.as_view()) ...