将自定义日志存储在数据库yii2中

Question

我正在尝试将requestedRoute，controller name，action name logged in user id等详细信息存储在我的日志表中。

所以我延长了yii\log\DbTarget。

namespace api\components;

use Yii;
use yii\log\DbTarget;

class DbExpTarget extends DbTarget{
    public function export(){
        $tableName = $this->db->quoteTableName($this->logTable);

        $sql = "INSERT INTO $tableName ([[event]], [[controller]], [[action]], [[userId]], [[createdAt]])
            VALUES (:event, :controller, :action,:userId, :createdAt)";

        $command = $this->db->createCommand($sql);

        $event=Yii::$app->controller->controllerule->requestedRoute;

        $controller=Yii::$app->controller->uniqueId;

        $action=Yii::$app->controller->action->id;

        $user=Yii::$app->user->identity->id;

        $command->bindValues([
            ':event' => $event,
            ':controller' => $controller,
            ':action' => $action,        
            ':userId' => $user,
            ':createdAt' => time(),
        ])->execute();
    }
}

配置/ main.php

'log' => [
    'traceLevel' => YII_DEBUG ? 3 : 0,
    'targets' => [
        [
            'class' => 'api\components\DbExpTarget',
            'levels' => ['info','trace','error']
        ]
    ]
]

但在export()功能中，我无法访问当前操作（$action=Yii::$app->controller->action->id）并登录用户ID（Yii::$app->user->identity->id）
我怎样才能获得这些细节？还是记录这些细节的简单方法？