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copied!<p>Pretty URLs for Rails 3.x and Rails 2.x without the need for any external plugin, but with a little hack, unfortunately.</p> <p>routes.rb</p> <pre><code>map.resources :posts, :except => [:show] map.post '/:year/:month/:slug', :controller => :posts, :action => :show, :year => /\d{4}/, :month => /\d{2}/, :slug => /[a-z0-9\-]+/ </code></pre> <p>application_controller.rb</p> <pre><code>def default_url_options(options = {}) # resource hack so that url_for(@post) works like it should if options[:controller] == 'posts' && options[:action] == 'show' options[:year] = @post.year options[:month] = @post.month end options end </code></pre> <p>post.rb</p> <pre><code>def to_param # optional slug end def year published_on.year end def month published_on.strftime('%m') end </code></pre> <p>view</p> <pre><code><%= link_to 'post', @post %> </code></pre> <p>Note, for Rails 3.x you might want to use this route definition:</p> <pre><code>resources :posts match '/:year/:month/:slug', :to => "posts#show", :as => :post, :year => /\d{4}/, :month => /\d{2}/, :slug => /[a-z0-9\-]+/ </code></pre> <p>Is there any badge for answering your own question? ;)</p> <p>Btw: the <a href="http://github.com/rails/rails/blob/master/actionpack/test/dispatch/routing_test.rb" rel="nofollow noreferrer">routing_test</a> file is a good place to see what you can do with Rails routing.</p> <p><strong>Update:</strong> Using <code>default_url_options</code> is a <strong>dead end</strong>. The posted solution works only when there is <code>@post</code> variable defined in the controller. If there is, for example, <code>@posts</code> variable with Array of posts, we are out of luck (becase <code>default_url_options</code> doesn't have access to view variables, like <code>p</code> in <code>@posts.each do |p|</code>.</p> <p>So this is still an open problem. Somebody help?</p>

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