php – Laravel 5.6：表创建失败

我是Laravel的新手,我正在尝试使用Schemafaçade创建表格.我用命令创建迁移文件

PHP artisan make:migration create_products_define_standards_table --create=products_define_standards

这是文件：

<?PHP

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateStandardsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('products_define_standards', function (Blueprint $table) {
            $table->increments('id');
            $table->string('code')->unique();
            $table->string('image');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('products_define_standards');
    }
}

它确实具有与默认createusersTable几乎相同的内容,但是当我运行PHP artisan migrate时,它会创建：

>用户表(默认)
>迁移表(默认)

但不是：

> password_resets’表(默认)
> products_define_standards’表(自定义)

我试过PHP artisan migrate：fresh但我得到了相同的日志：

Dropped all tables successfully.
Migration table created successfully.

   Illuminate\Database\QueryException  : 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`(`email`))

  at /home/whatever/whatever.com/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: 
  669:         return $result;

  Exception trace:

  1   PDOException::("sqlSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes")
      /home/whatever/whatever.com/vendor/laravel/framework/src/Illuminate/Database/Connection.PHP : 458

  2   PDOStatement::execute()
      /home/whatever/whatever.com/vendor/laravel/framework/src/Illuminate/Database/Connection.PHP : 458

我找到了this answer,我也运行了composer dumpauto但结果是一样的.

我错过了什么吗？我是否应该在其他地方注册迁移？

解决方法:

编辑位于app / Providers目录中的AppServiceProvider.PHP,并在boot()方法内设置默认字符串长度.

use Illuminate\Support\Facades\Schema;

public function boot()
{
    Schema::defaultStringLength(191);
}