AJAX calls action for a partial?

I have a page show.html.erb with a corresponding action 'show'. Lower on the page, a partial is loaded called _filter.html.erb which contains undefined instances (so basically, on the initial load, nothing is displayed there).

In the show.html.erb, I have a form that uses AJAX and submits to an action called "filter" which is supposed to create some instances for use within the _filter partial (so now, the _filter partial within show will have some content).

But when i submit the form, it says Template is missing Missing template results/filter.

But what it should be doing is staying on the same current template (show.html.erb) and just run the filter action and update the partial _fitler.

Any suggestions?

UPDATE

Following some things i found online, i made a file _filter.js.erb withing the views/results directory (same dir as show.html.erb and _filter.html.erb):

$("filter").update("<%= escape_javascript(render(开发者_运维问答"filter"))%>");

But it doesnt seem to be doing anything..

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By rails convention if you use the name _filter then you should put this file in shared folder.

So it's should be shared/_filter.html.erb