Cleanup

node_modules/mongoose/lib/helpers/clone.js

@@ -10,6 +10,7 @@ const getFunctionName = require('./getFunctionName');
 const isBsonType = require('./isBsonType');
 const isObject = require('./isObject');
 const symbols = require('./symbols');
+const utils = require('../utils');
 
 
 /*!
@@ -41,6 +42,11 @@ function clone(obj, options, isArrayChild) {
     if (options && options._skipSingleNestedGetters && obj.$isSingleNested) {
       options = Object.assign({}, options, { getters: false });
     }
+
+    if (utils.isPOJO(obj) && obj.$__ != null && obj._doc != null) {
+      return obj._doc;
+    }
+
     if (options && options.json && typeof obj.toJSON === 'function') {
       return obj.toJSON(options);
     }
@@ -105,7 +111,7 @@ function cloneObject(obj, options, isArrayChild) {
   const ret = {};
   let hasKeys;
 
-  for (const k in obj) {
+  for (const k of Object.keys(obj)) {
     if (specialProperties.has(k)) {
       continue;
     }