update ingredient list

app/decorators/ingredient_decorator.rb

@@ -0,0 +1,17 @@
+class IngredientDecorator < BaseDecorator
+
+  def ndbn_check
+    if ndbn.present?
+      "<span class =\"glyphicon glyphicon-ok\"></span>".html_safe
+    else
+      ''
+    end
+  end
+
+  def density
+    if wrapped.density.present?
+      value = UnitConversion::parse(wrapped.density)
+      value.convert('oz/cup').change_formatter(UnitConversion::DecimalFormatter.new).pretty_value
+    end
+  end
+end

app/views/ingredients/index.html.erb

@@ -16,22 +16,22 @@
         <thead>
         <tr>
           <th>Name</th>
-          <th>USDA NDBN</th>
+          <th>USDA</th>
           <th>KCal per 100g</th>
-          <th>Density</th>
+          <th>Density (oz/cup)</th>
           <th></th>
         </tr>
         </thead>
 
         <tbody>
-        <% @ingredients.each do |ingredient| %>
+        <% decorate(@ingredients, IngredientDecorator).each do |ingredient| %>
           <tr>
             <td><%= link_to ingredient.name, edit_ingredient_path(ingredient) %></td>
-            <td><%= ingredient.ndbn %></td>
+            <td><%= ingredient.ndbn_check %></td>
             <td><%= ingredient.kcal %></td>
             <td><%= ingredient.density %></td>
             <td>
-              <%= link_to ingredient, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-sm btn-danger' do %>
+              <%= link_to ingredient, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-xs btn-danger' do %>
                 <span class="glyphicon glyphicon-remove"></span>
               <% end %>
             </td>