Nested models make up Rails 3

I follow along with Railscast 196 in which R Bates makes nested forms. It has a polling model with a has_many association with a Questions model. The poll also accepts the_requested_attribute_name: values. In the new action survey_controller it does the following to create three question fields in the survey form

  def new
    @survey = Survey.new
    3.times { @survey.questions.build }
  end

      

        
        
        
      

    

and inside form_for @survey it has the following to create question fields in the form

<% f.fields_for :questions do |builder| %>

  <p>
    <%= builder.label :content, "Question" %><br />
    <%= builder.text_area :content, :rows =>  3 %>

  </p>

      

        
        
        
      

    

In the video, as soon as he clicks on a new survey, he displays three question fields (along with other form elements). Question related form elements are not showing for me. I think he did this episode before Rails 3 was released, so something changed, however I can't figure out what, except that I can't see the results of the run 3 times (@ survey.questions.build )

Model

class Survey < ActiveRecord::Base
  attr_accessible :name

  has_many :questions, :dependent => :destroy
  accepts_nested_attributes_for :questions
end

      

        
        
        
      

    

The form

<%= form_for @survey do |f| %>
  <%= f.error_messages %>
  <p>
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </p>

  <% f.fields_for :questions do |builder| %>

  <p>
    <%= builder.label :content, "Question" %><br />
    <%= builder.text_area :content, :rows =>  3 %>

  </p>
  <% end %>
  <p><%= f.submit %></p>
<% end %>

      

        
        
        
      

    

html form

<form accept-charset="UTF-8" action="/surveys" class="new_survey" id="new_survey" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="&#x2713;"><input name="authenticity_token" type="hidden" value="AWvA3/JpixF0C3sO8OzA5mMGsJzknvu99eovYv7M78E="></div>

  <p>
    <label for="survey_name">Name</label><br />
    <input id="survey_name" name="survey[name]" size="30" type="text">
  </p>

  <p><input name="commit" type="submit" value="Create Survey"></p>
</form>

      

        
        
        
      

    

Update

inside the form, I added this

 <%= @survey.questions %>

      

        
        
        
      

    

and he shows it

[#<Question id: nil, survey_id: nil, content: nil, created_at: nil, updated_at: nil>, #<Question id: nil, survey_id: nil, content: nil, created_at: nil, updated_at: nil>, #<Question id: nil, survey_id: nil, content: nil, created_at: nil, updated_at: nil>]

      

        
        
        
      

    

so the 3.times in the new Survey controller action obviously work, but for some reason the fields are not showing when I do

<% f.fields_for :questions do |builder| %>

      <p>
        <%= builder.label :content, "Question" %><br />
        <%= builder.text_area :content, :rows =>  3 %>

      </p>