1、更新内核

2、修复模型bug
3、修复后台部分操作的bug
4、清除多余文件

core/library/think/db/builder/Mysql.php

@@ -31,7 +31,7 @@ class Mysql extends Builder
         $key = trim($key);
         if (strpos($key, '$.') && false === strpos($key, '(')) {
             // JSON字段支持
-            list($field, $name) = explode($key, '$.');
+            list($field, $name) = explode('$.', $key);
             $key                = 'jsn_extract(' . $field . ', \'$.\'.' . $name . ')';
         }
         if (!preg_match('/[,\'\"\*\(\)`.\s]/', $key)) {