在 Laravle 6 中，设置 MySQL 字段类型 json 值的重构(基于辅助函数 Arr 实现)

1、现有的代码实现

if ($themeInstallationTask->setting_migrations) {
 $settingMigrations = $themeInstallationTask->setting_migrations;
}
$settingMigrations[] = [
 'file' => $availableVersion . '/' . $this->migrateSettingsDataFile,
 'exec_at' => now()->utc()->toDateTimeString()
];
$themeInstallationTask->setting_migrations = $settingMigrations;
$themeInstallationTask->save();

2、最终生成的结构如下所示，是一个数组，字段名称为：setting_migrations

[
  {
    "file": "v2.0.15-rc.6/migrate_settings_data.php",
    "exec_at": "2022-10-31 09:45:06"
  },
  {
    "file": "v2.0.15-rc.7/migrate_settings_data.php",
    "exec_at": "2022-10-31 09:45:06"
  },
  {
    "file": "v2.0.15/migrate_settings_data.php",
    "exec_at": "2022-10-31 09:45:06"
  },
  {
    "file": "v2.0.17-rc.0/migrate_settings_data.php",
    "exec_at": "2022-10-31 09:45:06"
  }
]

3、决定调整字段的名称为 extra，将 setting_migrations 字段的值纳入其中，代码调整如下，基于辅助函数 Arr 实现。

$extra = $themeInstallationTask->extra;
if (Arr::has($extra, 'setting_migrations')) {
 $settingMigrations = Arr::get($extra, 'setting_migrations');
}
$settingMigrations[] = [
 'file' => $file,
 'exec_at' => now()->utc()->toDateTimeString()
];
Arr::set($extra, 'setting_migrations', $settingMigrations);
$themeInstallationTask->extra = $extra;
$themeInstallationTask->save();

4、最终生成的结构如下所示，是一个对象，字段名称为：extra。如图1

{
  "setting_migrations": [
    {
      "file": "v2.0.15-rc.6/migrate_settings_data.php",
      "exec_at": "2022-10-31 09:45:06"
    },
    {
      "file": "v2.0.15-rc.7/migrate_settings_data.php",
      "exec_at": "2022-10-31 09:45:06"
    },
    {
      "file": "v2.0.15/migrate_settings_data.php",
      "exec_at": "2022-10-31 09:45:06"
    },
    {
      "file": "v2.0.17-rc.0/migrate_settings_data.php",
      "exec_at": "2022-10-31 09:45:06"
    }
  ]
}