app/views/produces/_form.html.erb
<%= form_for(@produce) do |f| %>
<% if @produce.errors.any? %>
<div id="errorExplanation">
<h2><%= pluralize(@produce.errors.count, "error") %> prohibited this produce from being saved:</h2>
<ul>
<% @produce.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :agent_id %><br />
<%= f.text_field :agent_id %>
</div>
<div class="field">
<%= f.label :manifestation_id %><br />
<%= f.text_field :manifestation_id %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>