How to Make Dynamic Forms Between Two Models Ruby on Rails 3+ -

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i searching 2 days , still can't make form using 2 models , , didn't understand formhelper view, not useful me , way make dynamic form between 2 models in rails 3.2 ? video old version of rails :( don't know do..

is episode can used in rails 3.2 ?? http://railscasts.com/episodes/88-dynamic-select-menus

**i need detailed example please**

i think you're looking fields_for - http://apidock.com/rails/actionview/helpers/formhelper/fields_for.


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