Laravel 事件错误，函数参数很少

Question

我正在尝试广播一个活动但没有成功。我找不到问题所在，而且我没有想法。我得到的错误是。

"Too few arguments to function App\Events\ConversationUpdate::__construct(),
1 passed in /app/Events/ConversationUpdate.php on line 36 and exactly 2 expected"

我想做的是在创建消息时，向聊天广播一个事件并使用新消息实时更新聊天。

这是我的代码：

控制器：

public function newConversationMessage(Thread $conversation, Request $request)
    {
        $user = Auth::user();
        $message = Message::create([
            'thread_id' => $conversation->id,
            'user_id' => $user->id,
            'body' => $request->body,
        ]);
        $message->user; 
        broadcast(new ConversationUpdate($conversation->id, $message));    
        return $message;
    }

事件：

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;

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

    public $conversationId;


    public $message;


    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($conversationId, $message)
    {
        $this->conversationId = $conversationId;
        $this->message = $message;
    }

    public function broadcastOn()
    {
        return new ConversationUpdate('conversation-'.$this->conversationId.'-updated');
    }
}

Answer 1

在函数 broadcastOn() 上你应该 return 像这样

return new PrivateChannel('conversation-'.$this->conversationId.'-updated');

而不是你所在的同一个 class 的另一个实例（错误实际上取决于你在构造函数中传递的单个参数）

Laravel 事件错误，函数参数很少

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