Laravelで足りないカラムを保存時に自動的に作ってくれるやつ

.php

<?php
protected static function boot()
    {
        parent::boot();
        self::saving(function($me){
            $columns = array_flip(\Schema::getColumnListing($me->getTable()));

            foreach($me->attributes as $key => $val) {
                if (!isset($columns[$key])) {
                    Schema::table($me->getTable(), function (Blueprint $table) use($key) {
                        $table->string($key)->nullable();
                    });
                }
            }
        });
    }