anchor.diff:    <%= f.fields_for :characters do |character| %>
     <div class="form-group">
       <%= character.label :name, "Character Name", class: "col-md-1 control-label" %>
  -    <div class="col-md-8">
  +    <div class="col-md-4">
         <%= character.text_field :name %>
       </div>
     </div>
   
     <div class="form-group">
       <%= character.label :actor_id, class: "col-md-1 control-label" %>
  -    <div class="col-md-8">
  +    <div class="col-md-4">
         <%= character.collection_select :actor_id, Actor.all, :id, :name, :include_blank => "Select Actor" %>
       </div>
     </div>
  
positive.code:     <%= character.fields_for :actor do |act| %>
      <div class="form-group">
        <%= act.label :name, "or Create New Actor", class: "col-md-1 control-label" %>
        <div class="col-md-8">
          <%= act.text_field :name, :value => '' %>
        </div>
      </div>
  
      <div class="form-group">
        <%= act.label :gender, "Male", class: "col-md-1 control-label" %>
        <div class="col-md-8">
          <%= act.radio_button :gender, "Male" %>
          <%= act.radio_button :gender, "Female" %>
        </div>
      </div>
  
      <div class="field">
        <%= act.label :age %>
        <%= act.number_field :age, {min: 1, max: 100} %><br><br>
      </div>
      <% end %>
    <% end %>
  
negative.code: <%= form_for movie, :html => {:class => "form-horizontal center"} do |f| %>
    <div class="form-group">
      <%= f.label :title, class: "col-md-1 control-label" %>
      <div class="col-md-4">
        <%= f.text_field :title %>
      </div>
    </div>
  
    <div class="form-group">
      <%= f.label :release_date, class: "col-md-1 control-label" %>
      <div class="col-md-4">
        <%= f.text_field :release_date %>
      </div>
    </div>
  
    <div class="form-group">
      <%= f.label :critic_rating, class: "col-md-1 control-label" %>
      <div class="col-md-4">
        <%= f.number_field :critic_rating, {min: 0, max: 100} %>
      </div>
    </div>
  
    <div class="form-group">
      <%= f.label :awards, class: "col-md-1 control-label" %>
      <div class="col-md-4">
        <%= f.number_field :awards, {min: 0, max: 50} %>
      </div>
    </div>
  