如何在另一个孩子的内部获取数据 - firebase

时间:2017-07-12 02:53:22

标签: java android firebase firebase-realtime-database

我正在尝试从Firebase获取数据。看起来像这样

enter image description here

你能给我一个解决方案吗?

1 个答案:

答案 0 :(得分:0)

尝试减少递增整数的数组,使用firebase提供的更多唯一递增ID,这样您就可以使用该唯一递增ID访问数据“KdfHHgJYggAyp-ZbFkP”看起来像这样

user.service.ts:54 TypeError: this.saveToken is not a function
at MapSubscriber.webpackJsonp.../../../../../src/app/user/user.service.ts.UserService.extractData [as project] (user.service.ts:31)
at MapSubscriber.webpackJsonp.../../../../rxjs/operator/map.js.MapSubscriber._next (map.js:77)
at MapSubscriber.webpackJsonp.../../../../rxjs/Subscriber.js.Subscriber.next (Subscriber.js:89)
at XMLHttpRequest.onLoad (http.es5.js:1226)
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:424)
at Object.onInvokeTask (core.es5.js:3881)
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423)
at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runTask (zone.js:191)
at XMLHttpRequest.ZoneTask.invoke (zone.js:486)

在您的情况下,您可以使用

var self = this