update docs

fix a compatibility bug

composer.json

@@ -3,7 +3,7 @@
     "description": "High performance QQ robot and web server development framework",
     "minimum-stability": "stable",
     "license": "Apache-2.0",
-    "version": "2.2.0",
+    "version": "2.2.1",
     "extra": {
         "exclude_annotate": [
             "src/ZM"

docs/update/v2.md

@@ -1,5 +1,11 @@
 # 更新日志（v2 版本）
 
+## v2.2.1
+
+> 更新时间：2021.1.29
+
+- 修复：配置文件兼容性问题
+
 ## v2.2.0
 
 > 更新时间：2021.1.29

src/ZM/Store/WorkerCache.php

@@ -15,7 +15,7 @@ class WorkerCache
     public static $transfer = [];
 
     public static function get($key) {
-        $config = self::$config ?? ZMConfig::get("global", "worker_cache");
+        $config = self::$config ?? ZMConfig::get("global", "worker_cache") ?? ["worker" => 0];
         if ($config["worker"] === server()->worker_id) {
             return self::$store[$key] ?? null;
         } else {