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PORails 3 has_one routing
 

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    <p>I have two classes:</p> <pre><code>class User &lt; ActiveRecord::Base :has_one :foo end class Foo &lt; ActiveRecord::Base :belongs_to :user end </code></pre> <p>The Foo is optional.</p> <p>I created the following routing:</p> <pre><code>resources :users do resources :foo end </code></pre> <p>Which results in the following routes:</p> <pre><code>GET /users/:user_id/foo(.:format) {:controller=&gt;"foos", :action=&gt;"index"} user_foos POST /users/:user_id/foo(.:format) {:controller=&gt;"foos", :action=&gt;"create"} new_user_foo GET /users/:user_id/foo/new(.:format) {:controller=&gt;"foos", :action=&gt;"new"} GET /users/:user_id/foo/:id(.:format) {:controller=&gt;"foos", :action=&gt;"show"} PUT /users/:user_id/foo/:id(.:format) {:controller=&gt;"foos", :action=&gt;"update"} user_foo DELETE /users/:user_id/foo/:id(.:format) {:controller=&gt;"foos", :action=&gt;"destroy"} edit_user_foo GET /users/:user_id/foo/:id/edit(.:format) {:controller=&gt;"foos", :action=&gt;"edit"} </code></pre> <p>Questions:</p> <ol> <li>It seems like the Index and Show actions are redundant. Should one of them be removed? If so, which one?</li> <li>The :id parameter in the Show action seems unnecessary, as user_id is a foreign key in the foos table and there is only one foo per user. Am I mistaken?</li> <li>I would like to have a graceful way to route to the New action if there isn't a foo. One option would be to test @user.foo.nil? in the FooController's Show or Index action, then redirect to the New action. Is there a better way?</li> </ol> <p>Thanks for your time.</p>
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