rails undefined method error_messages

rails undefined method error_messages

rails undefined method error_messages

学习了：http://stackoverflow.com/questions/10002140/use-error-messages-in-rails-3-2-raises-undefined-method-error

<%= form_for [@camp, @program] do |f| %>
   <% @program.errors.full_messages.each do |msg| %>
      <p><%= msg %></p>
   <% end %>
<%= f.label :name %>
<% end %>