save asset static file

app/views/admin/assets/index.html.erb

@@ -13,7 +13,9 @@
 
 <% @assets.each do |asset| %>
   <tr>
-    <td><%= link_to asset.filename, admin_asset_path(asset) %></td>
+    <td><%#= link_to asset.filename, admin_asset_path(asset) %>
+        <%= link_to asset.url, asset.url %>
+    </td>
     <td><%= asset.description %></td>
     <td><%= asset.data.content_type %></td>
     <td><%= asset.data.file_name %></td>