Laravel - Migrations - Index Lengths Mysql Mariadb

By default, Laravel uses the utf8mb4 character set. If you are running a version of MySQL older than the 5.7.7 release or MariaDB older than the 10.2.2 release, you may need to manually configure the default string length generated by migrations in order for MySQL to create indexes for them. You may configure the default string length by calling the Schema::defaultStringLength method within the boot method of your App\Providers\AppServiceProvider class:

    use Illuminate\Support\Facades\Schema;
     * Bootstrap any application services.
     * @return void
    public function boot()

Alternatively, you may enable the innodb_large_prefix option for your database. Refer to your database's documentation for instructions on how to properly enable this option.