app/views/albums/_form.html.erb
<%= form_for(@album) do |f| %>
<% if @album.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@album.errors.count, "error") %> prohibited this album from being saved:</h2>
<ul>
<% @album.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :collection_id %><br />
<%= f.collection_select :collection_id, Collection.collections_for_select, :id, :name %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>