在 Laravel 6 中,在服务容器中绑定一个单例后,如何在解析时重新设置单例的构造方法的参数?
1、在服务容器中绑定一个单例,现有的实现如下
$this->app->singleton(ThemeHandler::class, function() {
return new ThemeHandler(
base_path('Modules') . '/ThemeStoreDb/Resources/setting_migrations'
);
});
class ThemeHandler
{
private $themeSettingMigrator;
public function __construct(string $defaultMigrationsLocation)
{
Log::info(
'$defaultMigrationsLocation',
[$defaultMigrationsLocation]
);
$this->themeSettingMigrator = new ThemeSettingMigrator($defaultMigrationsLocation);
}
}
app(ThemeHandler::class)->migrateThemeSettings($this->themeInstallation, $this->themeInstallationTask);
2、现在有需要在解析单例后,可能需要重新设置单例的构造方法的参数。新的实现如下
$this->app->singleton(ThemeHandler::class, function($app, $parameters) {
return new ThemeHandler(
$parameters['migrationsLocation'] ?? base_path('Modules') . '/ThemeStoreDb/Resources/setting_migrations'
);
});
app(ThemeHandler::class, ['migrationsLocation' => 'E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1'])->migrateThemeSettings($this->themeInstallation, $this->themeInstallationTask);
3、app(ThemeHandler::class, []) 与 app(ThemeHandler::class, [‘migrationsLocation’ => ‘E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1’]) 在构造方法中的参数分别输出至日志中,符合预期。
[2023-07-06 15:49:57] local.INFO: $defaultMigrationsLocation [
"E:\\wwwroot\\object\\Modules/ThemeStoreDb/Resources/setting_migrations"
]
[2023-07-06 16:16:47] local.INFO: $defaultMigrationsLocation [
"E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1"
]
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