小编Pet*_*pek的帖子

当我没有检查previous.exists()时,我的firebase云函数被多次调用.我收到多个推送通知.

if (!event.data.exists()){
    return;
}
if (event.data.previous.exists()){
    return;
}

但是当我检查它时,我没有得到推送通知.这是不工作的代码:我应该改变什么？

exports.sendShoppingListInvitationNotification = functions.database.ref('/invites/{id}/').onWrite(event => {
//get the snapshot of the written data
const snapshot = event.data;  

if (!event.data.exists()){
    return;
}
if (event.data.previous.exists()){
    return;
}

    //get snapshot values
    console.log(snapshot.key);
const receiptToken = snapshot.child('receiptFcmToken').val();
const senderName = snapshot.child('senderNickname').val();
const inviteMessage = snapshot.child('inviteMessage').val();
const senderImage = snapshot.child('senderProfileImageURL').val();


//create Notification
const payload = {
    notification: {
        title: `Invitation from ${senderName}`,
        body:  `${inviteMessage}`,
        icon: `${senderImage}`,
        badge: '1',
        sound: 'default',
    }
};               

//send a notification to …