Firebase Error: Registration token(s) provided to sendToDevice() must be a non-empty string or a non-empty...
0
i want to send users notification when they are being sent friend request using firebase cloud messaging, but when the request is sent it returns this error in firebase function log
Error: Registration token(s) provided to sendToDevice() must be a non-empty string or a non-empty array.
at FirebaseMessagingError.Error (native)
at FirebaseMessagingError.FirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:39:28)
this is the java-script code i am using
'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});javascript firebase firebase-cloud-messaging google-cloud-functions
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
add a comment |
0
i want to send users notification when they are being sent friend request using firebase cloud messaging, but when the request is sent it returns this error in firebase function log
Error: Registration token(s) provided to sendToDevice() must be a non-empty string or a non-empty array.
at FirebaseMessagingError.Error (native)
at FirebaseMessagingError.FirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:39:28)
this is the java-script code i am using
'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});javascript firebase firebase-cloud-messaging google-cloud-functions
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
add a comment |
0
0
0
i want to send users notification when they are being sent friend request using firebase cloud messaging, but when the request is sent it returns this error in firebase function log
Error: Registration token(s) provided to sendToDevice() must be a non-empty string or a non-empty array.
at FirebaseMessagingError.Error (native)
at FirebaseMessagingError.FirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:39:28)
this is the java-script code i am using
'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});javascript firebase firebase-cloud-messaging google-cloud-functions
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
i want to send users notification when they are being sent friend request using firebase cloud messaging, but when the request is sent it returns this error in firebase function log
Error: Registration token(s) provided to sendToDevice() must be a non-empty string or a non-empty array.
at FirebaseMessagingError.Error (native)
at FirebaseMessagingError.FirebaseError [as constructor] (/user_code/node_modules/firebase-admin/lib/utils/error.js:39:28)
this is the java-script code i am using
'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});'use strict'
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite((change, context) => {
const user_id = context.params.user_id;
const notification_id = context.params.notification_id;
console.log('We Have A Notification for :', user_id);
if (!change.after.val()){
return console.log("A Notification Has Been Deleted From The Database: ", notification_id)
}
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
});javascript firebase firebase-cloud-messaging google-cloud-functions
javascript firebase firebase-cloud-messaging google-cloud-functions
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
edited Nov 24 '18 at 22:59
Frank van Puffelen
238k29382408
238k29382408
asked Nov 24 '18 at 9:04
EricEric
356
asked Nov 24 '18 at 9:04
EricEric
356
asked Nov 24 '18 at 9:04
EricEric
356
356
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
0
It sounds like token_id is null or an empty string. Most likely that's because /Notifications/${user_id}/${notification_id} doesn't exist in your database, for example when there is no token for the targeted user.
To prevent the error message, simply check if the snapshot exists before using its value:
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
if (!result.exists() || result.val() === "") return false;
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
add a comment |
0
after many wasted hours i got to discover what was wrong. now the issue was that i was pointing to the wrong path. this line of code was the issue
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
it was supposed to be this
const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
answered Nov 24 '18 at 19:19
EricEric
356
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
It sounds like token_id is null or an empty string. Most likely that's because /Notifications/${user_id}/${notification_id} doesn't exist in your database, for example when there is no token for the targeted user.
To prevent the error message, simply check if the snapshot exists before using its value:
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
if (!result.exists() || result.val() === "") return false;
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
add a comment |
0
It sounds like token_id is null or an empty string. Most likely that's because /Notifications/${user_id}/${notification_id} doesn't exist in your database, for example when there is no token for the targeted user.
To prevent the error message, simply check if the snapshot exists before using its value:
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
if (!result.exists() || result.val() === "") return false;
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
add a comment |
0
0
0
It sounds like token_id is null or an empty string. Most likely that's because /Notifications/${user_id}/${notification_id} doesn't exist in your database, for example when there is no token for the targeted user.
To prevent the error message, simply check if the snapshot exists before using its value:
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
if (!result.exists() || result.val() === "") return false;
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
It sounds like token_id is null or an empty string. Most likely that's because /Notifications/${user_id}/${notification_id} doesn't exist in your database, for example when there is no token for the targeted user.
To prevent the error message, simply check if the snapshot exists before using its value:
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
return deviceToken.then(result => {
if (!result.exists() || result.val() === "") return false;
const token_id = result.val();
const payload = {
notification: {
title: "Friend Request",
body: "You just got a new friend request",
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload ).then(Response =>{
console.log('this is the notification')
});
});
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
edited Nov 24 '18 at 18:05
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
answered Nov 24 '18 at 15:13
Frank van PuffelenFrank van Puffelen
238k29382408
238k29382408
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
add a comment |
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
i just tried it and it returned same error
– Eric
Nov 24 '18 at 16:55
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
Yeah, you might be storing an empty string in your database, so I just added a clause for that. Note that it's important you understand why this happens, so check your database for empty tokens and decide whether that is a normal use-case for your app. If so, make sure all your code deals with it correctly, not just when an error shows up like it did here.
– Frank van Puffelen
Nov 24 '18 at 18:06
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i have checked my database and all the users have a device token stored. do you need a screen shot of my database?
– Eric
Nov 24 '18 at 18:43
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
i need someone to slap me right now. i just found my silly mistake, i was pointing to a wrong path
– Eric
Nov 24 '18 at 19:13
add a comment |
0
after many wasted hours i got to discover what was wrong. now the issue was that i was pointing to the wrong path. this line of code was the issue
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
it was supposed to be this
const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
answered Nov 24 '18 at 19:19
EricEric
356
add a comment |
0
after many wasted hours i got to discover what was wrong. now the issue was that i was pointing to the wrong path. this line of code was the issue
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
it was supposed to be this
const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
answered Nov 24 '18 at 19:19
EricEric
356
add a comment |
0
0
0
after many wasted hours i got to discover what was wrong. now the issue was that i was pointing to the wrong path. this line of code was the issue
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
it was supposed to be this
const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
answered Nov 24 '18 at 19:19
EricEric
356
after many wasted hours i got to discover what was wrong. now the issue was that i was pointing to the wrong path. this line of code was the issue
const deviceToken = admin.database().ref(`/Notifications/${user_id}/${notification_id}`).once('value');
it was supposed to be this
const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
answered Nov 24 '18 at 19:19
EricEric
356
answered Nov 24 '18 at 19:19
EricEric
356
answered Nov 24 '18 at 19:19
EricEric
356
answered Nov 24 '18 at 19:19
EricEric
356
356
add a comment |
add a comment |
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