Rails core - Sep 2008 - Ticket for Review: Extend named routes to support an object's to_params() method (yes, i know that makes no sense :)

Hi all -

Thanks for taking a look!

Ticket:
http://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/1115-path-to-extend-named-routes-support-for-an-objects-to_params-method

Description:
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The title not make sense so here''s a brief description.

I have a route as follows:

map.school ''/schools/:state/:city/:id/:name''

This is done for SEO purposes. Generating URLs is a pain however.
Currently I need to specify every argument either in hash form or  
positional form.

This patch extends named routing so that if my School class
defined "to_params()" I can do this:


school_path(@school)

This assumes that I have the following method in my School model
(and that I have some associations to State and City):


def to_params
   {:state => state.full_name, :city => city.name,
    :id => id, :name => name.downcase}
end

If that method exists it will call it and continue processing the  
named route
using the returned hash. If it does not it will continue on as normal.

NOTE: This only works for named routes and only if there is a single  
argument
to the named route.

One reason this comes in really handy is when using the subdomain-fu  
plugin I can now specify what subdomain a model should always be  
linked to within the model and forget about it.
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