exchange/app/Booking.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Booking extends Model
{
    // protected $guarded = [];
    protected $fillable = ['term', 'rate_id', 'user_id', 'amount', 'account_name', 'account_num', 'bank_name', 
                            'bank_branch', 'company_name'];
                            
    public $timestamps = true;

    public function user(){
        return $this->belongsTo('app\User');
    }

    public function userBankSlip(){
        return $this->hasOne(UserBankSlip::class);
    }
}