ActionView::Base.computed_public_paths cacheing not consistent with ActionController::Base.perform_caching = false

In essence:

• I load a page (in development mode) - it looks pretty
• I change the CSS file some
• I go back to the browser and hit "refresh"
• My CSS change doesn't take effect. The browser is using a completely cached version of the css file.
• I restart my web server
• I refresh the browser
• The CSS change takes.

This all happens because ActionView::Base.computed_public_paths effectively caches the timestamp querystring, rendering the timestamped querystring ineffective at forcing the browser to reload a changed asset file.

The following monkey patch fixes the problem:

  unless ActionController::Base.perform_caching
    ActionController::Dispatcher.class_eval do
      before_dispatch :clear_computed_public_paths

      def clear_computed_public_paths
        ActionView::Base.computed_public_paths.clear
      end
    end
  end