--- a/server/src/app/Repositories/RdfDocumentRepository.php	Fri Nov 27 17:59:36 2015 +0100
+++ b/server/src/app/Repositories/RdfDocumentRepository.php	Tue Dec 01 13:33:08 2015 +0100
@@ -134,12 +134,12 @@
 
         $page = Paginator::resolveCurrentPage($pageName);
 
-        assert(is_numeric($page));
+        assert(is_null($page) || is_numeric($page));
 
         $total = $this->getCount();
 
         $offset = max(0,($page - 1) * $perPage);
-        
+
         $query =
             "SELECT DISTINCT ?uri ?doc ?title ?issued ?modified".
             "    WHERE {".