Fixed issue #6

src/Jenssegers/Mongodb/Model.php

@@ -24,6 +24,13 @@ abstract class Model extends \Illuminate\Database\Eloquent\Model {
      */
     protected $primaryKey = '_id';
 
+    /**
+     * The connection resolver instance.
+     *
+     * @var \Illuminate\Database\ConnectionResolverInterface
+     */
+    protected static $resolver;
+
     /**
      * Convert a DateTime to a storable string.
      *