在Firebase的Cloud Functions中,例如:
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onWrite(event => {
//how to access data at another node, for example
//important/messages/{pushId}
})
如何在其他节点上读取数据,例如/important/messages/{pushId}
?感谢
答案 0 :(得分:18)
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
})
})
例如,检查此示例:https://github.com/firebase/functions-samples/blob/master/fcm-notifications/functions/index.js