bugfix: hook 函数可能造成死循环

Author: sdjcw

lib/leanengine.js

@@ -317,6 +317,22 @@ var call = function(funcName, params, user, meta, cb) {
   }
 };
 
+var hookMarks = [
+  '__before',
+  '__after_update',
+  '__after'
+];
+
+// 如果对象有 hook 标记，则需要明确 set 一次，标记才会保存在 changed 列表
+// 这样调用 REST API 时才会将标记一同传到存储服务端
+var setHookMark = function (obj) {
+  for (i in hookMarks) {
+    if (obj.get(hookMarks[i])) {
+      obj.set(hookMarks[i], obj.get(hookMarks[i]));
+    }
+  }
+}
+
 var classHook = function(className, hook, object, user, meta, cb) {
   if (!Cloud.__code[hook + className]) {
     var err = new Error("LeanEngine not found hook '" + hook + className +  "' for app '" + AV.applicationId + "' on " + NODE_ENV + ".");
@@ -325,6 +341,7 @@ var classHook = function(className, hook, object, user, meta, cb) {
   }
   var obj = createAVObject(className);
   obj._finishFetch(object, true);
+  setHookMark(obj)
   try {
     if (hook.indexOf('__after_') === 0) {
       // after 的 hook 不需要 response 参数，并且请求默认返回 ok