Kent-logistics-Laravel/app/Models/ChatMessage.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class ChatMessage extends Model
{
    use HasFactory;

    protected $fillable = [
    'ticket_id',
    'sender_id',
    'sender_type',
    'message',
    'file_path',
    'file_type',
    'read_by_admin',
    'read_by_user',
    'client_id',
];
    /**
     * The ticket this message belongs to.
     */
    public function ticket()
    {
        return $this->belongsTo(SupportTicket::class, 'ticket_id');
    }

    /**
     * Polymorphic sender (User or Admin)
     */
    public function sender()
    {
        return $this->morphTo();
    }
}