Syntax error or access violation: 1071 Specified key was too long; max key lengt

新建立了個laravel5框架，而後安裝laravel-admin並運行migration的時候出現了以下報錯問題

php artisan admin:install複製代碼

Migration table created successfully.

In Connection.php line 664:

  SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes (SQL: alter table `users` add unique `users_email_unique`(`emai
  l`))


In PDOStatement.php line 119:

  SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes


In PDOStatement.php line 117:

  SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes複製代碼

是數據庫建立特殊字符過長問題

laravel 5.4 改變了默認的數據庫字符集，如今utf8mb4包括存儲emojis支持。若是你運行MySQL v5.7.7或者更高版本，則不須要作任何事情。

在app\Providers\AppServiceProvider.php添加默認值

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Schema; //add fixed sql

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        Schema::defaultStringLength(191); //add fixed sql
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}複製代碼

這個問題是laravel的問題，看到這個文章，能讓第一次安裝的人避開這個問題

如已解決此問題，可選擇查看laravel-admin的各類小技巧，邁過新手的坑：juejin.im/post/5d0c39…