2 files changed, 41 insertions, 11 deletions
diff --git a/admin/configuration.php b/admin/configuration.php
index de8311b97..a59e815fc 100644
--- a/admin/configuration.php
+++ b/admin/configuration.php
@@ -135,15 +135,18 @@ if (isset($_POST['submit']))
         {
           $order_by = array();
           $order_by_inside_category = array();
+          
           for ($i=0; $i<count($_POST['order_by_field']); $i++)
           {
-            if ($i>5) continue;
-            if ($_POST['order_by_field'][$i] == '')
+            if ( $i >= (count($sort_fields)-1) ) break; // limit to the number of available parameters
+            if ( empty($_POST['order_by_field'][$i]) )
             {
               array_push($page['errors'], l10n('No field selected'));
+              break;
             }
             else
             {
+              // there is no rank outside categories
               if ($_POST['order_by_field'][$i] != 'rank')
               {
                 $order_by[] = $_POST['order_by_field'][$i].' '.$_POST['order_by_direction'][$i];
@@ -151,8 +154,15 @@ if (isset($_POST['submit']))
               $order_by_inside_category[] = $_POST['order_by_field'][$i].' '.$_POST['order_by_direction'][$i];
             }
           }
+          // must define a default order_by if user want to order by rank only
+          if ( count($order_by) == 0 )
+          {
+            $order_by = array('id ASC');
+          }
+          
           $_POST['order_by'] = 'ORDER BY '.implode(', ', $order_by);
           $_POST['order_by_inside_category'] = 'ORDER BY '.implode(', ', $order_by_inside_category);
+          unset($_POST['order_by_field']);
         }
       }
       
diff --git a/admin/themes/default/template/configuration.tpl b/admin/themes/default/template/configuration.tpl
index f426eaca9..982e20357 100644
--- a/admin/themes/default/template/configuration.tpl
+++ b/admin/themes/default/template/configuration.tpl
@@ -115,24 +115,44 @@
     </li>
     
 {if !$ORDER_BY_IS_CUSTOM}
-{footer_script require='jquery'}{literal}
+{footer_script require='jquery'}
+// counters for displaying of addFilter link
+fields = {$main.order_by|@count}; max_fields = {$main.order_field_options|@count}; max_fields--;
+
+{literal}
+function updateAddFilterLink() {
+  if (fields >= max_fields) {
+    $('.addFilter').css('display', 'none');
+  } else {
+    $('.addFilter').css('display', '');
+  }
+}
+
+function updateRemoveFilterTrigger() {
+  $(".removeFilter").click(function () {
+    $(this).parent('span.filter').remove();
+    fields--;
+    updateAddFilterLink();
+  });
+}
+
 jQuery(document).ready(function () {
   $('.addFilter').click(function() {
     rel = $(this).attr('rel');
     $(this).prev('span.filter').clone().insertBefore($(this));
     $(this).prev('span.filter').children('select[name="order_by_field[]"]').val('');
     $(this).prev('span.filter').children('select[name="order_by_direction[]"]').val('ASC');
-      
-    $(".removeFilter").click(function () {
-      $(this).parent('span.filter').remove();
-    });
+    
+    fields++;
+    updateAddFilterLink();  
+    updateRemoveFilterTrigger();
   });
   
-  $(".removeFilter").click(function () {
-    $(this).parent('span.filter').remove();
-  });
+  updateRemoveFilterTrigger();
+  updateAddFilterLink();
 });
-{/literal}{/footer_script}
+{/literal}
+{/footer_script}
 {/if}
   </ul>
 </fieldset>