Rails equivalent to symfony's admin generator?

Does Rails have an equivalent to the admin generator feature in
symfony? The admin generator works similarly to scaffolding and basic
crud generators but is much more advanced for generating admin
interfaces and uses YAML files for configuration and more advanced
features over just basic crud. I've only just started playing with
rails and haven't yet seen anything like symfony's feature.

Thanks

try ajax_scaffold http://www.ajaxscaffold.com/
or streamlined http://streamlined.relevancellc.com/