My function is triggered by a database event and uses Firebase Cloud Messaging to send a notification to a topic. My first function works fine, but the second one keeps throwing this error:

2018-02-20T21:16:49.878Z E receiveMessage: TypeError: admin.messaging(...).send is not a function
at exports.receiveMessage.functions.database.ref.onCreate (/user_code/index.js:55:27)
at Object.<anonymous> (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:59:27)
at next (native)
at /user_code/node_modules/firebase-functions/lib/cloud-functions.js:28:71
at __awaiter (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:24:12)
at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:53:36)
at /var/tmp/worker/worker.js:695:26
at process._tickDomainCallback (internal/process/next_tick.js:135:7)

here is the index.js file:

const functions = require('firebase-functions');

const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

// // Create and Deploy Your First Cloud Functions
// // 
//
// exports.helloWorld = functions.https.onRequest((request, response) => {
//  response.send("Hello from Firebase!");
// });
exports.recceiveInvitation = /* the function that works */;

exports.receiveMessage = functions.database.ref('/messages/{chatId}/{time}').onCreate((event) => {
    const chatId = event.params.chatId;
    console.log('messages', chatId);
    var sender = event.data.val().name;
    var messageContent = event.data.val().message;
    if(messageContent.length >= 100){
        messageContent = messageContent.substring(0,97)+"...";
    }
    const payload = {
        data: {
            title: `New Message from ${sender}`,
            body: messageContent
        },
        topic: chatId
    };

    return admin.messaging().send(payload);
});

I ran npm install firebase-admin, but I did not help.

My function is triggered by a database event and uses Firebase Cloud Messaging to send a notification to a topic. My first function works fine, but the second one keeps throwing this error:

2018-02-20T21:16:49.878Z E receiveMessage: TypeError: admin.messaging(...).send is not a function
at exports.receiveMessage.functions.database.ref.onCreate (/user_code/index.js:55:27)
at Object.<anonymous> (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:59:27)
at next (native)
at /user_code/node_modules/firebase-functions/lib/cloud-functions.js:28:71
at __awaiter (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:24:12)
at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:53:36)
at /var/tmp/worker/worker.js:695:26
at process._tickDomainCallback (internal/process/next_tick.js:135:7)

here is the index.js file:

const functions = require('firebase-functions');

const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

// // Create and Deploy Your First Cloud Functions
// // https://firebase.google./docs/functions/write-firebase-functions
//
// exports.helloWorld = functions.https.onRequest((request, response) => {
//  response.send("Hello from Firebase!");
// });
exports.recceiveInvitation = /* the function that works */;

exports.receiveMessage = functions.database.ref('/messages/{chatId}/{time}').onCreate((event) => {
    const chatId = event.params.chatId;
    console.log('messages', chatId);
    var sender = event.data.val().name;
    var messageContent = event.data.val().message;
    if(messageContent.length >= 100){
        messageContent = messageContent.substring(0,97)+"...";
    }
    const payload = {
        data: {
            title: `New Message from ${sender}`,
            body: messageContent
        },
        topic: chatId
    };

    return admin.messaging().send(payload);
});

I ran npm install firebase-admin, but I did not help.

• javascript
• node.js
• firebase
• firebase-cloud-messaging
• google-cloud-functions

• Log the value of admin.messaging() and update your question with the result. – Doug Stevenson Commented Feb 20, 2018 at 21:43
• How should I log it? I tried, : var mesaging = admin.mesaging(); console.log("Messaging: ",messaging); but it didn't even log, it just gave me the same error – Bas Commented Feb 20, 2018 at 21:51

2 Answers 2

change this:

return admin.messaging().send(payload);

to this:

return admin.messaging().sendToTopic(topicname,payload);

to be able to send notifications to topics.

You can do the above, or check the note below

Note:

You need to update the firebase-admin npm package, to be able to use send():

npm install firebase-admin@latest

more info here:-

https://firebase.google./support/release-notes/admin/node https://firebase.google./docs/cloud-messaging/admin/send-messages

let message = {notification: {title: "your title",body: "your message",},token:"token of user device"
      };

admin.messaging().send(message)