设备的FCM云功能打字稿

Question

是否可以使用此数据结构将FCM发送到设备？创建文档时会触发该函数，但会出现错误“令牌必须为非空字符串或数组”。我的代码可以固定吗，还是我无法做到？

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
admin.initializeApp();

const db = admin.firestore();
const fcm = admin.messaging();


export const sendToDevice = functions.firestore
  .document('messages/{userid}')
  .onCreate(async snapshot => {


    const querySnapshot = await db
      .collection('messages')
      .doc('userid')
      .collection('tokens')

      .get();

    const token = querySnapshot.docs.map(token => token.id);

    const payload: admin.messaging.MessagingPayload = {
      notification: {
        title: 'Emergency',
        body: `Alert`,
      //  icon: 'your-icon-url',
        click_action: 'FLUTTER_NOTIFICATION_CLICK'
      }
    };

    return fcm.sendToDevice(token, payload);
  });

云功能是否可以使用具有此类数据库结构的on create方法将FCM发送到设备？还是文档必须仅包含令牌而没有其他内容？

Answer 1

我能够修改您的代码以在设备上获取消息。有关更多详细信息，请参见代码中的评论：

const payload: admin.messaging.MessagingPayload = {
      notification: {
        title: 'Emergency',
        body: `Alert`,
        // icon: 'your-icon-url',
        // click_action: 'FLUTTER_NOTIFICATION_CLICK' // ** do not put it here
      },
      data: { click_action: 'FLUTTER_NOTIFICATION_CLICK', message: 'Your MSG' } // Use this data section
    };