InquiryModel.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class InquiryModel extends Model
{

    protected $table = 'inquiry';

    public $timestamps = false;

    public function inquiry_items()
    {
        return $this->hasMany(InquiryItemsModel::class, 'inquiry_id', 'inquiry_id');
    }

    public static function addInquiry($inquiry)
    {
        return self::insertGetId($inquiry);
    }

}