admin.dukany.io/app/Models/DiscountWithOrder.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class DiscountWithOrder extends Model
{
   protected $table = "tb_dm_order_with_discount";
   protected $guarded = [];

   public function discounts(){
       $a =  $this->belongsTo('App\Models\Discounts','discount_id','id');
      return $a;
   }
}