访问Firebase云端函数中的数据库数据 [英] Access db data in Cloud Functions for Firebase
本文介绍了访问Firebase云端函数中的数据库数据的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
exports.makeUppercase = functions.database.ref('/ messages / {pushId} / original')
.onWrite(event => {
//如何访问另一个节点上的数据,例如
// important / messages / {pushId}
$ p $如何在另一个节点读取数据,例如 /重要/消息/ {pushId}
?谢谢
解决方案
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config()。firebase);
$ b $ exports.makeUppercase = functions.database.ref('/ messages / {pushId} / original')
.onWrite(event => {
const getSomethingPromise = admin。数据库()。ref(`/ important / messages / {pushId}`).once('value');
return getSomethingPromise.then(results => {
const somethingSnapshot =结果[0];
//使用快照
})
})
请查看以下示例: https://github.com/firebase/functions-samples/blob/master/fcm-notifications/functions/index.js
In Cloud Functions for Firebase, for example:
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onWrite(event => {
//how to access data at another node, for example
//important/messages/{pushId}
})
How to do I read data at another node, for example /important/messages/{pushId}
? Thanks
解决方案 const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onWrite(event => {
const getSomethingPromise = admin.database().ref(`/important/messages/{pushId}`).once('value');
return getSomethingPromise.then(results => {
const somethingSnapshot = results[0];
// Do something with the snapshot
})
})
Check this example for instance: https://github.com/firebase/functions-samples/blob/master/fcm-notifications/functions/index.js
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