exchange/app/Booking.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Booking extends Model
{
    // protected $guarded = [];
    protected $fillable = ['term', 'amount', 'rate_id', 'user_id', 'account_name', 'account_num', 'bank_name', 'bank_branch', 'company_name', 'company_address', 'bank_address', 'swift_code', 'cnap' ,'verification_status'];
    public $timestamps = true;
    
    public function user(){
        return $this->belongsTo('app\User');
    }

    // has one userbankslip
    public function uploadbankslip()
    {
        return $this->hasOne('app\UserBankSlip');
    }
}