From 1d7389598123ee0b87d4893bdf042d40f7e6ce90 Mon Sep 17 00:00:00 2001
From: Jaeger <hj.q@qq.com>
Date: Fri, 15 Dec 2017 11:05:32 +0800
Subject: [PATCH] single instance

---
 src/QueryList.php | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/QueryList.php b/src/QueryList.php
index 994a053..192f161 100644
--- a/src/QueryList.php
+++ b/src/QueryList.php
@@ -40,7 +40,7 @@ class QueryList
 {
     protected $query;
     protected $kernel;
-    protected static $plugins = [];
+    protected static $instance = null;
 
     /**
      * QueryList constructor.
@@ -74,14 +74,14 @@ class QueryList
     }
 
     /**
-     * Get the QueryList instance
+     * Get the QueryList single instance
      *
      * @return QueryList
      */
     public static function getInstance()
     {
-        $instance = new self();
-        return $instance;
+        self::$instance || self::$instance = new self();
+        return self::$instance;
     }
 
     /**