app-api/app/Models/ZBS/InteGiftOrder.php

<?php

namespace App\Models\ZBS;

use Illuminate\Database\Eloquent\Model;

class InteGiftOrder extends Model{

    protected $connection='mysql_zb';
    protected $table='orders';
    public function get_gift(){
        return $this->hasOne(InteGift::class,'id','gift_id');
    }
}