解决数据库查询的一个不兼容问题

app/controller/admin/Base.php

@@ -160,7 +160,7 @@ class Base extends BaseC {
 			// 是否开发者模式
 			$where['is_dev'] = 0;
 		}
-		$row = Menu::where($where)->order('sort asc')->field('id,title,url,icon,"" as style')->select();
+		$row = Menu::where($where)->order('sort asc')->field('id,title,url,icon,'' as style')->select();
 		foreach ($row as $key => $value) {
 			//此处用来做权限判断
 			if (!IS_ROOT && !$this->checkRule(substr($value['url'], 1), 2, null)) {