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[routing guide] Add mention of get '/:username' route

This is fairly common in Rails applications and is requested a lot of the time on Stack Overflow and #rubyonrails
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1 parent 7a323e2 commit 9122143767b419c3be6b8ec86fd9b90ba7c39fe6 @radar radar committed May 26, 2012
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  1. +8 −0 guides/source/routing.textile
@@ -445,6 +445,14 @@ get 'exit' => 'sessions#destroy', :as => :logout
This will create +logout_path+ and +logout_url+ as named helpers in your application. Calling +logout_path+ will return +/exit+
+You can also use this to override routing methods defined by resources, like this:
+get ':username', :to => "users#show", :as => :user
+This will define a +user_path+ method that will be available in controllers, helpers and views that will go to a route such as +/bob+. Inside the +show+ action of +UsersController+, +params[:username]+ will contain the username for the user. Change +:username+ in the route definition if you do not want your parameter name to be +:username+.
h4. HTTP Verb Constraints
In general, you should use the +get+, +post+, +put+ and +delete+ methods to constrain a route to a particular verb. You can use the +match+ method with the +:via+ option to match multiple verbs at once:

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