Event broadcasting wrongly serialize payload

[simonesada]

Laravel Version

11

PHP Version

8.3

Database Driver & Version

MySQL 8.0 for Windows 11 (x64)

Description

The Event class is not correctly serializing the event payload. The seat object's ID is being serialized as a string instead of a JSON object.
I am using Laravel Reverb 1.0 to broadcast the event trough WebSocket and receive the message on differente clients (Chrome and Postman).

Event class:

<?php

namespace App\Events;

use App\Http\Resources\SeatResource;
use App\Models\Seat;
use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class SeatUpdatedEvent implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public function __construct(
        public Seat $seat
    ) {
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return array<int, \Illuminate\Broadcasting\Channel>
     */
    public function broadcastOn(): array
    {
        return [
            new Channel('show-'.$this->seat->show_id),
        ];
    }

    public function broadcastWith(): array
    {
        return ['id' => $this->seat->id];
    }
}

JSON response:

{
    "event": "App\\Events\\SeatUpdatedEvent",
    "data": "{\"id\":\"9bec334a-9e6c-46be-a8b6-b61458eeeace\"}",
    "channel": "show-9bec334a-93d3-47ef-86f1-fabd2f97c352"
}

Steps To Reproduce

1. Define an event that implements ShouldBroadcast interface and has a payload
2. Connect from a client to the channel defined by the event
3. Dispatch the event and verify the JSON response

[driesvints]

Transferred to the Reverb repo.

[joedixon]

@simonesada this is the expected format as per the Pusher docs: https://pusher.com/docs/channels/library_auth_reference/pusher-websockets-protocol/#double-encoding