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This will create routing helpers such as `magazine_periodical_ads_url` and `edit_magazine_periodical_ad_path`.
+### Overriding Named Route Parameters
+
+The `:param` option overrides the default resource identifier `:id` allowing you to use the specified name in your controller action to find the specific resource in the database.
+
+```ruby
+resources :videos, param: :identifier
+```
+
+```
+ videos GET /videos(.:format) videos#index
+ POST /videos(.:format) videos#create
+ new_videos GET /videos/new(.:format) videos#new
+edit_videos GET /videos/:identifier/edit(.:format) videos#edit
+```
+
+```ruby
+Video.find_by(identifier: params[:identifier])
+```
+
Inspecting and Testing Routes
-----------------------------