[Question]: `GetRecipients()` returns 0 on successful delivery with `include_external_user_ids`

[1plam]

How can we help?

Hey,

I have a question about the response from the createNotificationRequest.Execute() when using the Go SDK (OneSignal/onesignal-go-api/v2 v2.2.1).

Goal

My goal is to reliably determine if a notification sent to a single user via include_external_user_ids was successfully created or if it failed because the user ID was invalid. This allows my service to trigger fallbacks.

What I'm Doing

I'm creating a notification targeting a single, valid external_user_id that I know could be subscribed and can receive notifications.

Observed Behavior

The push notification is delivered successfully to the user's device. The API returns a 200 OK response and the CreateNotificationSuccessResponse object contains a valid notification id.

However, the recipients field in the response is 0.

My Question

I was planning to use the recipients count as a primary indicator of a successful send, like this:

// Simplified logic
resp, httpResponse, err := client.CreateNotification(ctx).Execute()

// My check for logical failure (e.g., invalid user)
if resp.GetId() == "" || resp.GetRecipients() == 0 {
    // This block gets triggered incorrectly because GetRecipients() returns 0,
    // even though the notification was sent and resp.GetId() has a value.
    log.Warn("Logical failure detected.") 
}

Could you clarify the expected behavior here?

1. Is it intentional for GetRecipients() to return 0?
2. Is there a potential delay before the recipients count is accurately reflected in the response?
3. What is the recommended, most reliable server-side method to confirm that a notification to a specific external_user_id has been successfully queued for delivery? I was thinking of just checking for the presence of a non-empty id (resp.GetId() != ""), but it's definitely too generic and ain't covering my needs.

Thank you for your time and help!

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