app-api/app/Models/TravelImage/TravelImageClass.php

<?php

namespace App\Models\TravelImage;

use Illuminate\Database\Eloquent\Model;

class TravelImageClass extends Model{
//    protected $connection = 'mysql_szy';
    protected $table='travel_img_class';

    public function get_image(){
        return $this->hasMany(TravelImage::class,'class_id');
    }

    public function get_folder(){
        return $this->hasMany(TravelImageFolder::class,'image_class_id');
    }
}