ruby on rails - respond_to in after_filter -

i dry controllers placing reoccurring code in before , after filters. in current project, every action has same respond_to block:

respond_to |wants|   wants.html   wants.js { render :layout => "transition" } end 

i placed in after_filter so:

after_filter :respond_to_html_or_transition 

but leads error:

render and/or redirect called multiple times in action. please note may call render or redirect, , @ once per action. note neither redirect nor render terminate execution of action, if want exit action after redirecting, need "redirect_to(...) , return".

this happens when there no explicit respond_to or redirect within action. i'm assuming happens because rails (for lack of explicit respond_to call) makes educated guess , creates own respond_to before after_filter. if that's case, there way me keep rails doing , instead use block in after_filter?

what trying accomplish not possible after_filter. after filter deals rendered action. @ point, render have completed (either explicit or implicit render), calling render result in double call.

you can extract code logic in method , call method. alternative make actions alias of single action, assuming body of actions can handled single method.

last not least, can write custom action responder , replace default 1 of controller setting

self.responder = customactionresponder