Show how to create a nested form
Show how to create a nested form like in this deprecated RailsCasts: http://railscasts.com/episodes/197-nested-model-form-part-2 or in this stackoverflow post: http://stackoverflow.com/questions/15568431/adding-dynamic-fields-to-nested-form-through-ajax
Oscar Miguel Amezcua commented
And add how to use wit has_many through
Stephen Dolan commented
I'd really love this cast since I'm new to Rails and have been struggling with this feature of my app for about a week now.