Firebase教程的功能不起作用

Question

我尝试通过以下教程来实现firebase函数：https://firebase.google.com/docs/functions/get-started

下面是我的代码。当我尝试调用网址https://us-central1-skoon-5ed4d.cloudfunctions.net/addMessage时，出现“错误：无法处理请求”

'use strict';

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.addMessage = functions.https.onRequest(async (req, res) => {
   const original = req.query.text;
   const snapshot = await admin.database().ref('/messages').push({original: original});
  Firebase console.res.redirect(303, snapshot.ref.toString());

});

exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onCreate((snapshot, context) => {
  // Grab the current value of what was written to the Realtime Database.
  const original = snapshot.val();
  console.log('Uppercasing', context.params.pushId, original);
  const uppercase = original.toUpperCase();
  // You must return a Promise when performing asynchronous tasks inside a Functions such as
  // writing to the Firebase Realtime Database.
  // Setting an "uppercase" sibling in the Realtime Database returns a Promise.
  return snapshot.ref.parent.child('uppercase').set(uppercase);
});

我删除了异步并等待，并且在日志中出现错误：

Reference.push failed: first argument contains undefined in property 'messages.original'
    at validateFirebaseData (/srv/node_modules/@firebase/database/dist/index.node.cjs.js:1433:15)
    at /srv/node_modules/@firebase/database/dist/index.node.cjs.js:1479:13
    at Object.forEach (/srv/node_modules/@firebase/util/dist/index.node.cjs.js:837:13)
    at validateFirebaseData (/srv/node_modules/@firebase/database/dist/index.node.cjs.js:1462:14)
    at validateFirebaseDataArg (/srv/node_modules/@firebase/database/dist/index.node.cjs.js:1421:5)
    at Reference.push (/srv/node_modules/@firebase/database/dist/index.node.cjs.js:14087:9)
    at exports.addMessage.functions.https.onRequest (/srv/index.js:23:54)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /worker/worker.js:724:7
    at /worker/worker.js:707:11