Categories: LaravelLaravel 6Laravel Database MigrationsLaravel Eloquent ORMMySQLMySQL 5.7SQLWeb应用开发Web框架数据库编程语言

在 Laravel 6 中，MySQL 表中使用 UUID 类型字段的实现

图3

1、数据库迁移实现如下，在 UUID 类型字段上添加了索引。

    public function up()
    {
        $tableName = 'theme_installation';

        Schema::create($tableName, function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->uuid('theme_id')->comment('主题ID')->unique();
            $table->timestamps();
        });

    }

2、执行迁移后，表字段类型为 char(36)。如图1

图1

CREATE TABLE `theme_installation` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `theme_id` char(36) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '主题ID',
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `theme_installation_theme_id_unique` (`theme_id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

3、在模型文件的构造方法中设置 UUID 类型的字段值为：Str::orderedUuid()，以利用排序功能。参考：https://itnext.io/laravel-the-mysterious-ordered-uuid-29e7500b4f8

use Illuminate\Support\Str;

    public function __construct(array $attributes = [])
    {
        $attributes['theme_id'] = Str::orderedUuid();
        parent::__construct($attributes);
    }

4、在实际执行模型插入时的实现

$themeInstallation = new ThemeInstallation();
$themeInstallation->wp_theme_id = $wpTheme->id;
$themeInstallation->theme_custom_name = $custom_name;
$themeInstallation->save();

5、执行时报错：Add [theme_id] to fillable property to allow mass assignment on [Modules\\ThemeStoreDB\\Entities\\ThemeInstallation].。如图2

图2

{
    "message": "Add [theme_id] to fillable property to allow mass assignment on [Modules\\ThemeStoreDB\\Entities\\ThemeInstallation].",
    "status_code": 500,
    "debug": {
        "line": 332,
        "file": "E:\\wwwroot\\object\\vendor\\laravel\\framework\\src\\Illuminate\\Database\\Eloquent\\Model.php",
        "class": "Illuminate\\Database\\Eloquent\\MassAssignmentException",
        "trace": 
    }
}

6、设置模型的 theme_id 属性可以批量赋值

protected $fillable = ['theme_id'];

7、最终生成的 SQL 如下，符合预期。如图3

图3

insert into
  `table` (
    `theme_custom_name`,
    `role`,
    `processing`,
    `processing_failed`,
    `theme_id`,
    `theme_store_theme_id`,
    `wp_theme_id`,
    `updated_at`,
    `created_at`
  )
values
  (
    '',
    'unpublished',
    1,
    0,
    '966165f6-139a-464d-b2aa-77af8bc32a4a',
    9,
    88,
    '2022-05-25 11:51:06',
    '2022-05-25 11:51:06'
  )

永夜