Rails - Jul 2006 - page.replace_html render(:action => ''other_action'')

I want to be DRY. I have a controller action, component, that renders 
html.
I have another controller action, component_update, that returns RJS:

This what I''d like for ''component_update.rjs'':
page[params[:scaffold_id]].replace_html render(:action =>
"component",
:layout => false)
page[params[:scaffold_id]].visual_effect :highlight

But, the render is returning ""

How do I reuse the component view?

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