Fix the test suite, make sure _id is set before using

Author: timgws

src/ElasticquentTrait.php

@@ -612,7 +612,10 @@ public function newFromHitBuilder($hit = array())
         $key_name = $this->getKeyName();
 
         $attributes = $hit['_source'];
-        $attributes[$key_name] = is_numeric($hit['_id']) ? intval($hit['_id']) : $hit['_id'];
+
+        if (isset($hit['_id'])) {
+            $attributes[$key_name] = is_numeric($hit['_id']) ? intval($hit['_id']) : $hit['_id'];
+        }
 
         // Add fields to attributes
         if (isset($hit['fields'])) {

src/config/elasticquent.php

@@ -27,6 +27,6 @@
     | Elasticquent models.
     */
 
-    'default_index' => 'default',
+    'default_index' => 'my_custom_index_name',
 
 );