Rails Form Association Automatically New -

i have rails form movies. in form title , trailer_id (which has youtube url)

trailer_id association trailers scaffold.

so when go /trailers/new , add new youtube url, can see in dropdown on movies/new.

but how automatically create new trailer when entered in movies form

so instead of having me go trailers/new , create new trailer how create directly movies form

you can use nested_form gem.

add gemfile

gem "nested_form" 

run bundle

add application.js

//= require jquery_nested_form 

add in movie.rb

has_many :trailers accepts_nested_attributes_for :trailers 

and in form view:

<%= nested_form_for @movie |f| %>   <%= f.fields_for :trailers |trailer_form| %>     <%= trailer_form.text_field :link %>     <%= trailer_form.link_to_remove "remove trailer" %>   <% end %>   <p><%= f.link_to_add "add trailer", :trailers %></p> <% end %> 

you can see more details on https://github.com/ryanb/nested_form