Enhancer of Rails’ content_for system. Allows defaults, and no_content_for overrides in partials. For Rails 3, 4. Why? Keep the views dry with content_for_with_default and friends! Complete flexibility in defining defaults and overrides. Remove most or all logic from views. Allow for no content to override a default. DryViews provides extensions to ActionView::Helpers::CaptureHelper, which is part of ActionPack: content_for_with_default no_content_for content_for (enhanced to play nice with the above methods) The rails rendering chain is sort of inside out so the template rendering happens first, and this is what makes it possible to override everything!