Merge pull request #30 from phantom-d/master

Fix error 'Invalid argument supplied for foreach()' for method all() in ActiveQuery

Author: cebe

ActiveQuery.php

@@ -116,6 +116,9 @@ public function all($db = null)
     {
         // TODO add support for orderBy
         $data = $this->executeScript($db, 'All');
+        if (empty($data)) {
+            return [];
+        }
         $rows = [];
         foreach ($data as $dataRow) {
             $row = [];