Laravel 5.6.17 php artisan 迁移错误与 php 7.2 [重复]

Question

我正在使用 laravel 5.6.17 和 php 7.2；当我运行php artisan migrate 命令时，我收到以下错误。

有关详细信息，已在声明的数据库中创建了默认表“users”和“migrations”。

laravel 不支持 php 7.2 吗？？

Image: laravel 5.6.17 php artisan migrate error

Migration table created successfully.
Illuminate\Database\QueryException  : SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `users` add unique `users_email_unique`(`email`))
at D:\xampp\htdocs\laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664
660|         // If an exception occurs when attempting to run a query, we'll format the error
661|         // message to include the bindings with SQL, which will make this exception a
662|         // lot more helpful to the developer instead of just the database's errors.
663|         catch (Exception $e) {
> 664|             throw new QueryException(
665|                 $query, $this->prepareBindings($bindings), $e
666|             );
667|         }
668|
Exception trace:
1   PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes")
D:\xampp\htdocs\laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458
2   PDOStatement::execute()
D:\xampp\htdocs\laravel\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458
Please use the argument -v to see more details.

Answer 1

在 AppServiceProvider.php 中，将此代码包含在文件顶部。

use Illuminate\Support\Facades\Schema;

然后你在启动方法中添加这段代码

Schema::defaultStringLength(191);

Answer 2

是的，我得到了答案on the following link...

只要从你的根目录<ROOT>/app/Providers/AppServiceProvider.php去下面的文件

之后：

1) 文件顶部的导入架构：use Illuminate\Support\Facades\Schema;

2) 并在boot方法中定义字符串的长度：Schema::defaultStringLength(191);

// Import Schema
use Illuminate\Support\Facades\Schema;
// ...

class AppServiceProvider extends ServiceProvider
{

public function boot()
{
    // Add the following line
    Schema::defaultStringLength(191);
}

// ...

}