SQLSTATE [HY000]：一般错误：1030 运行迁移时出现错误 168

Question

我通过 composer 安装了全新的 laravel 7，创建了数据库并连接到 .env。 但是，当我运行迁移时，我看到以下错误：

    ➜  laravel-adp-4 git:(develop) ✗ php artisan migrate

   Illuminate\Database\QueryException

  SQLSTATE[HY000]: General error: 1030 Got error 168 - 'Unknown (generic) error from engine' from storage engine (SQL: create table `migrations` (`id` int unsigned not null auto_increment primary key, `migration` varchar(255) not null, `batch` int not null) default character set utf8mb4 collate 'utf8mb4_unicode_ci')

我可以确认我的所有服务都已启动：

➜  laravel-adp-4 git:(develop) ✗ brew services list
Name      Status  User    Plist
mysql     started macbook /Users/macbook/Library/LaunchAgents/homebrew.mxcl.mysql.plist
mysql@5.7 started macbook /Users/macbook/Library/LaunchAgents/homebrew.mxcl.mysql@5.7.plist
nginx     started root    /Library/LaunchDaemons/homebrew.mxcl.nginx.plist
php       started root    /Library/LaunchDaemons/homebrew.mxcl.php.plist
php@7.3   started macbook /Users/macbook/Library/LaunchAgents/homebrew.mxcl.php@7.3.plist

尝试进行故障排除时，我注意到我无法再操作 mysql。 当我尝试创建另一个数据库时，我看到以下错误：

ERROR 3680 (HY000): Failed to create schema directory 'alala' (errno: 2 - No such file or directory)

为什么我无法运行迁移？ 为什么我无法创建数据库？

Answer 1

您的查询不正确，您在 utf8mb4_unicode_ci 周围的单引号太多

create table `migrations` (`id` int unsigned not null auto_increment primary key, `migration` varchar(255) not null, `batch` int not null) 
default character set utf8mb4 collate utf8mb4_unicode_ci