:buffet_drinks undefined variable error ...

_form.html.erb

<%= nested_form_for [event, buffet] do |f| %>
    <% if buffet.errors.any? %>
        <div id="error_explanation">
          <h2><%= pluralize(buffet.errors.count, "error") %>
            prohibited this buffet from being saved:
          </h2>

          <ul>
            <% :buffet.errors.full_messages.each do |msg| %>
                <li><%= msg %></li>
            <% end %>
          </ul>
        </div>
    <% end %>
    <h2>Drinks</h2>
    <%= f.fields_for :buffet_drinks do |drink_form| %>
        <p>
          <%= drink_form.label :qty %>
          <%= drink_form.text_field :qty %>
          <%= drink_form.collection_select(:drink_id, Drink.all, :id, :name) %>
          <%= drink_form.link_to_remove "remove" %>
        </p>
    <% end %>
    <p><%= f.link_to_add "Add", :buffet_drinks %></p>

    <h2>Foods</h2>
    <%= f.fields_for:buffet_foods do |food_form| %>
        <p>
          <%= food_form.label :qty %>
          <%= food_form.text_field :qty %>
          <%= food_form.collection_select(:food_id, Food.all, :id, :name) %>
          <%= food_form.link_to_remove "remove" %>
        </p>
    <% end %>
    <p><%= f.link_to_add "Add", :buffet_foods %></p>
    <div class="actions">
      <%= f.submit %>
    </div>
<% end %>

_form.html.erb<

<%= nested_form_for [event, buffet] do |f| %>
    <% if buffet.errors.any? %>
        <div id="error_explanation">
          <h2><%= pluralize(buffet.errors.count, "error") %>
            prohibited this buffet from being saved:
          </h2>

          <ul>
            <% :buffet.errors.full_messages.each do |msg| %>
                <li><%= msg %></li>
            <% end %>
          </ul>
        </div>
    <% end %>
    <h2>Drinks</h2>
    <%= f.fields_for :buffet_drinks do |drink_form| %>
        <p>
          <%= drink_form.label :qty %>
          <%= drink_form.text_field :qty %>
          <%= drink_form.collection_select(:drink_id, Drink.all, :id, :name) %>
          <%= drink_form.link_to_remove "remove" %>
        </p>
    <% end %>
    <p><%= f.link_to_add "Add", :buffet_drinks %></p>

    <h2>Foods</h2>
    <%= f.fields_for:buffet_foods do |food_form| %>
        <p>
          <%= food_form.label :qty %>
          <%= food_form.text_field :qty %>
          <%= food_form.collection_select(:food_id, Food.all, :id, :name) %>
          <%= food_form.link_to_remove "remove" %>
        </p>
    <% end %>
    <p><%= f.link_to_add "Add", :buffet_foods %></p>
    <div class="actions">
      <%= f.submit %>
    </div>
<% end %>