App\Models\Chat\Message::channel PHP Méthode

    public function channel()
    {
        return $this->belongsTo(Channel::class);
    }

 public function sendMessage(User $sender, $body)
 {
     $message = new Message();
     $message->user_id = $sender->user_id;
     $message->content = $body;
     $message->channel()->associate($this);
     $message->save();
     return true;
 }