[question]: Custom data {custom_data} parameter is missing!

[abhishekr77]

What happened?

I am trying to navigate to specific page which needs ID, which i have to pass through the custom_data.

This is the rest-API Payload:

{
"app_id": "appId",
"headings": {"en": "Low Stock❗"},
"priority":"high",
"target_channel": "push",
"include_aliases":{
"external_id": [
"XXXXXXXXXXXXXX"
]
},
"big_picture": "https://media.onesignal.com/automated_push_templates/feature_announcement_template.png",
"android_channel_id": "58bf147a-35de-4914-92f1-1ab9898ff66d",
"template_id": "27429e2c-25b4-4629-81be-1a897a32e778", // works when content_available is false, you can swt template with image
"content_available": false,
"custom_data": {
"item_name": "Mango",
"small_icon":"https://media.onesignal.com/automated_push_templates/feature_announcement_template.png",
"itemId":"12"
}
}

Implementation on flutter side:

OneSignal.Debug.setLogLevel(OSLogLevel.verbose);
OneSignal.initialize("api_key");
OneSignal.Notifications.requestPermission(true);
OneSignal.Notifications.addClickListener((event) {
print(
'NOTIFICATION CLICK LISTENER CALLED WITH EVENT: ${event.notification.jsonRepresentation().replaceAll("\n", "\n")}');
});

Response:
custom data: {google.delivered_priority: normal, google.sent_time: 1724257118981, google.ttl: 259200, google.original_priority: normal, custom: {"i":"8c06af37-c521-4361-957d-fd560b1ada05","a":{""deepLink"":"{{ message.custom_data.small_icon }}"},"ti":"27429e2c-25b4-4629-81be-1a897a32e778","tn":"item low stock "}, google.product_id: 111881503, pri: 6, vis: 0, chnl: {"nm":"New Orders","id":"OS_58bf147a-35de-4914-92f1-1ab9898ff66d","dscr":"new order notifications","grp_id":"OS_cbda6537-bd6c-4f97-bf47-7cccf4c57070","grp_nm":"OrderPe"}, from: 29331827621, alert: Mango-(12) is low in stock, click to manage, bicon: https://media.onesignal.com/automated_push_templates/feature_announcement_template.png, licon: https://media.onesignal.com/automated_push_templates/feature_announcement_template.png, sicon: ic_stat_onesignal_default, title: Low Stock❗, google.message_id: 0:1724257118991720%1bdee165f9fd7ecd, google.c.sender.id: 29331827621, androidNotificationId: 1043054470}

I am not getting the custom_data parameter in the response, can anyone tell what i am doing wrong

Steps to reproduce?

1. Try to send custom_data from rest-api and handle on click method.

What did you expect to happen?

the response supposed to have custom_data so i can handle it from flutter side.

OneSignal Flutter SDK version

5.2.3

Which platform(s) are affected?

• iOS
• Android

Relevant log output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[abhishekr77]

{ "alert": "Mango-(12)" is low in stock, click to manage"}, i have managed to get some values by using liquid Syntax. And i am passing through templates.
.

But when i am trying the same in additional data like this :

i am getting response like this {""deepLink"":"{{ message.custom_data.small_icon }}"}. But i need to pass custom data in this field so i can handle at Notifications.addClickListener((event) .

[Parthajeet-Sarmah]

I am having the same issue for React Native. No custom_data property is visible. Did anyone find a fix?

[abhishekr77]

have you figured it out? i am able to solve it though.

` Map<String, dynamic>? additionalData=event.notification.additionalData;

if(additionalData!=null){
    AutoRouter.of(context).pushNamed(additionalData["navigate_to"]);
}`

[abhishekr77]

in case you are wondering this is the payload
URL: https://api.onesignal.com/notifications
body: `{
"app_id": "your-app-id",
"headings": {"en": "Low Stock❗"},
"priority":"high",
"target_channel": "push",
"include_aliases":{
"external_id": [
"your_id"
]
},
"android_channel_id": "replace-with-yours",
"template_id": "template-id", // works when content_available is false, you can set template with image
"content_available": false,
"data": {
"navigate_to":"product/5725"
},
"custom_data": {
"item_name": "Mango",
"small_icon":"https://media.onesignal.com/automated_push_templates/feature_announcement_template.png",
"inStock":"3"
}

}`