app-api/app/Models/BigGiftApply.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class BigGiftApply extends Model{

    protected $table='big_gift_apply';
    protected $guarded=[];

    public function user(){
        return $this->hasOne(User::class,'id','user_id');
    }

    public function order(){
        return $this->hasOne(Ordertest::class,'id','order_id');
    }
}