title: Rails classes reloading in production mode
body: <p>Is there a way to reload ruby model in runtime?</p>
  
  <p>For example I've a model</p>
  
  <pre><code>class Model
    def self.all_models
      @@all_models ||= Model.all
    end    
  end
  </code></pre>
  
  <p>Records in this model are changed very rarely, but then they do, I don't want to reload whole application, just this one class.</p>