laravel 5.5 数据库迁移报错

话不多说：先看报错信息

error

解决办法：找到 /App/Providers/AppServiceProvider.php

<?php

namespace AppProviders;

use IlluminateSupportServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function boot()
    {
        // 加入这一行
        IlluminateSupportFacadesSchema::defaultStringLength(191);
    }
}