在Vue.js I获取json文件的一些数据,如下所示:
export default {
data () {
return {
data: []
}
},
created () {
this.fetchData();
},
methods: {
fetchData () {
$.getJSON('data/api.json', function(el) {
this.data = el;
}.bind(this)),
}
}
}
获取的数据具有以下 struct :
{
time: '17:00',
pick: {
box: {
single: 1,
multi: 2
}
}
}
当我试图访问组件中的{{ data.pick.box }} or {{ data.pick.box.single }}
时,总是会收到以下错误消息:
vue.js?3de6:2963 Uncaught TypeError: Cannot read property 'box' of undefined
at Proxy.render (eval at <anonymous> (app.js:126), <anonymous>:4:46)
at VueComponent.Vue._render (eval at <anonymous> (app.js:139), <anonymous>:2954:22)
at VueComponent.eval (eval at <anonymous> (app.js:139), <anonymous>:2191:21)
at Watcher.get (eval at <anonymous> (app.js:139), <anonymous>:1656:27)
at new Watcher (eval at <anonymous> (app.js:139), <anonymous>:1648:12)
at VueComponent.Vue._mount (eval at <anonymous> (app.js:139), <anonymous>:2190:19)
at VueComponent.Vue$3.$mount (eval at <anonymous> (app.js:139), <anonymous>:5978:15)
at VueComponent.Vue$3.$mount (eval at <anonymous> (app.js:139), <anonymous>:8305:16)
at init (eval at <anonymous> (app.js:139), <anonymous>:2502:11)
at createComponent (eval at <anonymous> (app.js:139), <anonymous>:4052:9)
访问深嵌套对象有任何限制吗?例如,当我调用{{ data }}
时,我将整个数据 struct 正确地显示为字符串.
正如诺拉所说,这是小提琴:jsfiddle