颤动:在一个集合中为不同的主题订阅用户以获取推送通知fcm [英] flutter: subscribing user to different topics in one collection for push notifications fcm

问题描述

我想为我的用户订阅不同的语言"根据他们的喜好选择主题，以便他们以所需的语言接收通知

i wanna subscribe my users to different "language" topics according to their preference so they receive notifications in the language they want

在我的Firestore中，我在其文档中有一个名为Notifications的集合(默认)，我还有另外两个集合..英语和阿拉伯语.

in my firestore i have a collection called notifications inside its document(default) i have two more collections .. english and arabic.

现在在我的购物应用程序中，我使用户适应英语主题以测试其是否有效

now in my shopping app i subbed the user to english topic to test if it works

_fcm.subscribeToTopic('english');

这是我针对云功能的index.js代码:

and here's my index.js code for cloud fuctions:

const functions = require('firebase-functions');
const admin = require('firebase-admin');
 
admin.initializeApp(functions.config().firebase);
 
var newData;
 
exports.messageTrigger = functions.firestore.document('notifications/default/{languageId}/{messagesId}').onCreate(async (snapshot, context) => {
newData = snapshot.data();
const payload = {
    notification: {
        title: newData.message,
        body: newData.body,
    },
        data: {
      click_action: 'FLUTTER_NOTIFICATION_CLICK',
      message: newData.message,
    }

};
if (context.param.languageId === "english") {
    await admin.messaging().sendToTopic('english', payload);
  }
  else if (context.param.languageId=== "arabic") {
    await admin.messaging().sendToTopic('arabic', payload);
  }
});

但是当我在通知集合内的英语集合中创建文档时，它不起作用.有人知道为什么吗?

but when i create a document in the english collection inside notifications collection it doesnt work. anybody know why?

推荐答案

我通过使我的函数固定如下来解决了这个问题:

i fixed it by making my functions like this:

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

admin.initializeApp(functions.config().firebase);
 
var newData;
 
exports.messageTrigger = functions.firestore.document('notifications/{notificationsId}').onCreate(async (snapshot, context) => {
newData = snapshot.data();
const payload = {
    notification: {
        title: newData.message,
        body: newData.body,
    },
        data: {
      click_action: 'FLUTTER_NOTIFICATION_CLICK',
      message: newData.message,
    }

};

if (newData.language === 'english'){
    await admin.messaging().sendToTopic('english', payload);
}else if (newData.language === 'arabic'){
await admin.messaging().sendToTopic('arabic', payload);
}
  
});

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