gistfile1.txt

#Link in video show view

<%= link_to "Enable Commenting", new_comment_title_path(:format => :js), :id => 'enable_commenting_link', :class => 'edit' %>

#comment_titles/new.js.erb

$("<%= escape_javscript render(:file => 'comment_titles/new.html.erb') %>").insertAfter('#enable_commenting_link');
$('#enable_commenting_link').hide();

#comment_titles/new.html.erb

<%= simple_form_for setup_video(@video) do |f| %>
  <% f.fields_for :comment_titles do |t| %>
      <% if t.object.new_record? %>
 	    <%= t.input :title, :label => "Comment Title:" %>
	    <%= t.button :submit, :value => 'Add', :id => 'add_comment_title' %>
	        <div class='hint'>Let your listeners know what comments you want by adding a guiding title for them. Pose a question, ask for feedback, or anything else!</div>
	    <% end %> 
	<% end %>
<% end %>

#I get this error when I click on a#enable_commenting_link:

NoMethodError in Comment_titles#new

Showing /rubyprograms/dreamstill/app/views/comment_titles/new.html.erb where line #1 raised:

undefined method `comment_titles' for nil:NilClass
Extracted source (around line #1):

1: <%= simple_form_for setup_video(@video) do |f| %>

#This is the application trace:

app/helpers/application_helper.rb:10:in `setup_video'
app/helpers/application_helper.rb:9:in `setup_video'
app/views/comment_titles/new.html.erb:1:in `_app_views_comment_titles_new_html_erb___1915748124_2173075480_0'
app/views/comment_titles/new.js.erb:1:in `_app_views_comment_titles_new_js_erb___1561617140_2173096440_0'