How to access app's routes inside app engine cron job?

Question

So I have the routes defined for my app inside main.py, something like:

app = webapp2.WSGIApplication([
    webapp2.Route('/',          handler=HomePage,       name="home")
])

Inside the cron job I can't seem to access the routes of the app, for example this doesn't work:

self.uri_for('home')

I found somewhere online a snippet that fixes it, but it's ugly to use:

cls.app.router.add(r)

Where r would be an array of routes.

Is there a way to have acces to the app's routes inside an app engine cron job?

Answer 1

Your example is incorrect, it seems to be a cross between simple routes and extended routes.

To be able to use self.uri_for('home') you need to use named routes, i.e. extended routes:

app = webapp2.WSGIApplication([
    webapp2.Route(r'/', handler=HomePage, name='home'),
])

With that in place self.uri_for('home') should work, assuming self is a webapp2.RequestHandler instance.

The workaround just looks ugly, but that is pretty much what uri_for does under the hood as well:

def uri_for(self, _name, *args, **kwargs):
    """Returns a URI for a named :class:`Route`.

    .. seealso:: :meth:`Router.build`.
    """
    return self.app.router.build(self.request, _name, args, kwargs)