Firebase云功能 - sendToTopic（）格式出错

Question

我的应用是一个团队管理系统，如果通过推送通知创建新事件，我想通知某个团队的所有玩家。可以创建两种类型的事件：Fixture和Training。我想为每个人分别发出通知。我正在尝试使用Firebase Cloud Functions，但我仍然遇到同样的错误。它表示事件已触发但出现此错误。我对JavaScript很新，所以请原谅，如果这是一个简单的语法错误，但我似乎无法让它工作。

Index.js

//import firebase functions modules
const functions = require('firebase-functions');
//import admin module
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

// // Listens for new fixtures being created
exports.newFixture = functions.database.ref('/Fixture/{currentTeam}/{pushId}').onWrite((change, context) => {

    console.log('new fixture event triggered');

    //  Grab the current value of what was written to the Realtime Database.
    var valueObject = change.after.val();

  // Create a notification
    const payload = {
        notification: {
            title: "New" + valueObject.type,
            body: "Details:" + " "+ valueObject.date + " " +valueObject.time + " " + "please open app and confirm availability",
            sound: "default"
        },
    };

  //Create an options object that contains the time to live for the notification and the priority
    const options = {
        priority: "high",
        timeToLive: 60 * 60 * 24
    };

    return admin.messaging().sendToTopic("/topics/{currentTeam}", payload, options);
});


// Listens for new trainings being created
exports.newTraining = functions.database.ref('/Training/{currentTeam}/{pushId}').onWrite((change, context) => {

  console.log('New training event triggered');

  //  Grab the current value of what was written to the Realtime Database.
  var valueObject = change.after.val();

// Create a notification
  const payload = {
      notification: {
          title: "New" + valueObject.type,
          body: "Details:" + " "+ valueObject.date + " " + valueObject.time + " " + "please open app and confirm availability",
          sound: "default"
      },
  };

//Create an options object that contains the time to live for the notification and the priority
  const options = {
      priority: "high",
      timeToLive: 60 * 60 * 24
  };

  return admin.messaging().sendToTopic("/topics/{currentTeam}", payload, options);
});

这是错误

Error: Topic provided to sendToTopic() must be a string which matches the format "/topics/[a-zA-Z0-9-_.~%]+".
    at FirebaseMessagingError.Error (native)
    at FirebaseMessagingError.FirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:39:28)
    at FirebaseMessagingError.PrefixedFirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:85:28)
    at new FirebaseMessagingError (/user_code/node_modules/firebase-admin/lib/utils/error.js:241:16)
    at Messaging.validateTopic (/user_code/node_modules/firebase-admin/lib/messaging/messaging.js:925:19)
    at /user_code/node_modules/firebase-admin/lib/messaging/messaging.js:611:19
    at process._tickDomainCallback (internal/process/next_tick.js:135:7)

数据库结构

功能日志

非常感谢任何帮助。

Answer 1

错误消息是：

Topic provided to sendToTopic() must be a string which matches the format "/topics/[a-zA-Z0-9-_.~%]+".

您对sendToTopic（）的调用是这样的：

sendToTopic("/topics/{currentTeam}", payload, options)

您对花括号的使用违反了错误消息中规定的规则。

如果您打算在函数路径定义中从通配符构建值为currentTeam的主题字符串，则需要将其从事件上下文中拉出来：

const currentTeam = context.params.currentTeam
sendToTopic("/topics/" + currentTeam, payload, options)