<% form_for @puppetclass do |f| %>
  <%= f.error_messages %>
  <p>
  <%= f.label :name, nil, :class => "span-3" %>
  <%= f.text_field :name, :class => "last" %>
  </p>

  <% field_set_tag("Puppet Environments") do %>
    <%= authorized_edit_habtm @puppetclass, Environment %>
  <% end -%>

  <% field_set_tag("Host Groups") do %>
    <%= authorized_edit_habtm @puppetclass, Hostgroup %>
  <% end -%>
  <% unless @puppetclass.new_record? -%>
    <p>
    Currently used by <%= @puppetclass.hosts.count %> hosts
    </p>
  <% end -%>

  <div>
    <% f.fields_for :lookup_keys do |builder| -%>
      <%= render 'lookup_keys/fields', :f => builder %>
    <% end -%>
  </div>
  <br>
  <%= authorized_for(params[:controller], params[:action]) ? link_to_add_fields("Add a new key", f, :lookup_keys, "lookup_keys/fields") : "Add a value" %>

  <br>
  <p><%= f.submit "Submit" %></p>
<% end %>





lookup_keys/_fields.html.erb

<%= f.error_messages if controller_name == "lookup_keys" %>
<table class="puppet-classes-table fields">
  <tr>
    <th>Key</th>
    <th>Description</th>
    <th>Default Value</th>
    <th>Validator Type</th>
    <th>Validatior Rule</th>
    <th>Order</th>
    <th></th>
  </tr>
  <tr>
    <td> <%= f.text_field :key, :class => "span-2" %> </td>
    <td> <%= f.text_field :description, :class => "span-5" %> </td>
    <td> <%= f.text_field :default_value, :class => "span-3" %> </td>
    <td> <%= f.select :validator_type, options_for_select(LookupKey::VALIDATION_TYPES, f.object.validator_type), {:include_blank => "string"} %> </td>
    <td> <%= f.text_field :validator_rule, :class => "span-3" %> </td>
    <td> <%= f.text_area :path, :size => "5x2", :value => f.object.path %> </td>
    <%= f.hidden_field :updated_at, :value => Time.now %>
    <td>
      <%= remove_value_link(f) %>
      <%= add_value_link(f) %>
    </td>
  </tr>
  <% f.fields_for :lookup_values do |builder| -%>
    <%= render 'lookup_keys/value', :f => builder %>
  <% end -%>
</table>

module LookupKeysHelper
  def add_value_link f
    link = "<span class='ui-icon ui-icon-plus' title='add new value'></span>"
    authorized_for(params[:controller], params[:action]) ? link_to_add_fields(link, f, :lookup_values, "lookup_keys/value") : link
  end

  def remove_value_link f
    link_to_remove_fields("remove", f) if authorized_for(params[:controller], params[:action]) unless controller_name == "lookup_keys"
  end
end