老师，我这里data传递失败了，是什么原因啊。

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Somnus1

2016-04-29

this.getAccessToken()
		.then(function(data){
			try {
				data = JSON.parse(data)
			}
			catch(e){
				return that.updataAccessToken()
			}
			if(that.isValidAccessToken(data)) {
				console.log('111');
				console.log(data)
				Promise.resolve(data)
			}
			else{
				return that.updataAccessToken()
			}
		})
		.then(function(data){
			console.log(data)
			that.access_token = data.access_token
			that.expires_in = data.expires_in
			that.saveAccessToken(data)
		})

Promise.resolve(data)的时候data还是有值得。可是到下一个then的时候then为空了，是什么原因啊？

下面是控制台的输出

localhost:weixin wangwenbin$ node --harmony app
Listening :2000
111
{ access_token: 'VVARpPTqrF3NerSGxqLnkOJZbJtB6nWZBJtSmdpumNbUTeZRBD4cs23AguWVxKiOfmuM7j8H5_VHOk2Mh5HrPxJpV0iYzNSEPrqvst2IbNzeQ4fcERFZSrFgwO9vRqFbHXPaAGAOEW',
  expires_in: 1461869776713 }
undefined
Unhandled rejection TypeError: Cannot read property 'access_token' of undefined
    at /Users/wangwenbin/Desktop/weixin/wechat/wechat.js:37:28
    at tryCatcher (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/promise.js:502:31)
    at Promise._settlePromise (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/promise.js:559:18)
    at Promise._settlePromise0 (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/promise.js:604:10)
    at Promise._settlePromises (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/promise.js:683:18)
    at Async._drainQueue (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/async.js:138:16)
    at Async._drainQueues (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/async.js:148:10)
    at Immediate.Async.drainQueues [as _onImmediate] (/Users/wangwenbin/Desktop/weixin/node_modules/bluebird/js/release/async.js:17:14)
    at processImmediate [as _immediateCallback] (timers.js:383:17)

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