Javascript Ember.js序列化程序JSONSerializer类型错误：payload.map不是函数

我是Ember的新手，我正在使用JSONSerializer来更改我的JSON。这是我的密码

import JSONSerializer from 'ember-data/serializers/json';

export default JSONSerializer.extend({
 normalizeResponse(store, primaryModelClass, payload, id, requestType) {

 var listOptions = payload.clients;


 for(i = 0; i < listOptions.length; i++) {
  //we do some operations and we end up with foo
 }

 newData = foo;

 for(i = 0; i < payload.clients.length; i++) {
    payload.clients[i].NAME = newData[i].text; 
    payload.clients[i].id = newData[i].value; 
 }

 return this._super(...arguments);

}

但我的有效载荷不是一个数组，而是一个对象：

payload
Object {clients: Array[4]}

多谢各位

payload
Object {clients: Array[4]}