Allow multiple digital files to be attached to a single variant.

Useful for multi-format ebook downloads

app/views/spree/admin/digitals/_form.html.erb

@@ -1,35 +1,36 @@
-<div class="yui-g">
-  <div class="yui-u first">
-  <%= form_for(:digital, :url => { :controller => 'digitals', :action => 'create' }, :html => { :multipart => true }) do |f| %>
+<div>
+  <div>
+    <%= form_for(:digital, :url => { :controller => 'digitals', :action => 'create' }, :html => { :multipart => true }) do |f| %>
     <fieldset>
       <legend><%= Spree::Variant.model_name.human %> "<%= variant.options_text %>"</legend>
       
-        <%= f.field_container :current_file do %>
-          <strong><%=t 'current_file' %>:</strong><br/>
-          <% if variant.digital? %>
-            <%= render variant.digital %><%=  %>
-          <% else %>
-            <%=t 'none' %>
-          <% end %>
-        <% end %>
-        
-      <p class="form-buttons">
-        <% if variant.digital? %>
-          <%= link_to t("delete_file"), admin_product_digital_url(:id => variant.digital.id), :confirm => t('delete_file_cofirmation', :filename => variant.digital.attachment_file_name), :method => :delete %>
-        <% else  %>
+      <%= f.field_container :current_file do %>
+      <strong><%=t 'files' %>:</strong>
+      <% if variant.digital? %>
+      <ul>
+        <% variant.digitals.each do |digital| %>
+        <li>
+         <%= render digital %>&nbsp;&nbsp;
+         <%= link_to t("delete_file"), admin_product_digital_url(:id => variant.digitals.first.id), :confirm => t('delete_file_cofirmation', :filename => variant.digitals.first.attachment_file_name), :method => :delete %>
+       </li>
+       <% end %>
+     </ul>
+     <% else %>
+     <%=t 'none' %>
+     <% end %>
+     <% end %>
 
-          <%= f.field_container :file do %>
-            <%= f.label :file, t("new_file") %> <span class="required">*</span><br/>
-            <%= f.file_field :attachment %>
-          <% end %>
-          
-          <%= hidden_field_tag 'digital[variant_id]', variant.id %>
+     <p class="form-buttons">
+      <%= f.field_container :file do %>
+      <%= f.label :file, t("new_file") %> <span class="required">*</span><br/>
+      <%= f.file_field :attachment %>
+      <% end %>
 
-          <%= button t('spree_digital.upload') %>
-        <% end %>
-      </p>
-      
-    </fieldset>
+      <%= hidden_field_tag 'digital[variant_id]', variant.id %>
+
+      <%= button t('spree_digital.upload') %>
+    </p>
+
+  </fieldset>
   <% end %>
-  </div>
-</div><br/>
+</div>