Added Quantity.primary to form

Fixed setting parent on Quantity form

app/controllers/quantities_controller.rb

@@ -58,7 +58,8 @@ class QuantitiesController < ApplicationController
       :name,
       :description,
       :domain,
-      :parent_id
+      :parent_id,
+      :primary
     )
   end
 

app/views/quantities/_form.html.erb

@@ -10,13 +10,17 @@
   <% end %>
   <p><%= f.text_field :name, size: 25, required: true %></p>
   <p><%= f.text_field :description, size: 200 %></p>
+  <p><%= f.check_box :primary %></p>
 </div>
 
 <%= javascript_tag do %>
   function domainChange() {
     $('[id^=parent_select_]').prop('disabled', true).hide();
+    $('[id^=parent_select_] select').attr('name', 'placeholder');
     $('[id=parent_select_'+$('#quantity_domain option:selected').val()+']')
       .prop('disabled', false).show();
+    $('[id=parent_select_'+$('#quantity_domain option:selected').val()+'] select')
+      .attr('name', 'quantity[parent_id]');
   }
   $('#quantity-form').on('click', '#quantity_domain', domainChange);