如何在Laravel中将数据传递给broadcastAs事件方法？

Question

I'm trying to pass data to the method broadcastAs, but I keep getting the error Too few arguments to function App\Events\NotifyUser::broadcastAs(). Below is what I have tried.

I'm calling the event on the Controller this way:

event(new NotifyUser('8', 'banned'));

And I'm trying to access the data on the event this way:

public $user;

public $msg;

public function __construct($user, $msg)
{
    $this->user = $user; //8
    $this->msg = $msg; //banned
}

public function broadcastAs($user)
{
    return "user-logged-$user";
}

It works just fine without the $user variable in the broadcastAs.

Answer 1

You should use it with your set property ($this->user) rather than an argument.

public $user;

public $msg;

public function __construct($user, $msg)
{
    $this->user = $user;
    $this->msg = $msg;
}

public function broadcastAs()
{
    return "user-logged-" . $this->user->id;
}

However, are you sure you want to use this there?

 window.Echo.private('channel-name.' + user_id)
        .listen('BroadcastClassName', (e) => { }  
        // you'll edit listen() with broadcastAs

---

public function broadcastOn()
{
    return new PrivateChannel('user.'.$this->user->id);
}

// broadcastAs() is optional
public function broadcastAs() {
    return 'customEventName';
}

broadcastAs() is optional for overriding event's name, as default one is class's name itself.

With my last chunk, this is what you'll get.

 window.Echo.private('user.' + user_id)
        .listen('customEventName', (e) => { }  

If you don't have broadcastAs() at all, in your case, your event name will be "NotifyUser", which seems right to me.

    window.Echo.private('user.' + user_id)
        .listen('NotifyUser', (e) => { }