YII2 自动 created_at created_by updated_by updated_at

use yii\behaviors\TimestampBehavior;
use yii\behaviors\BlameableBehavior;
use yii\db\Expression;

/**
 * @inheritdoc
 * 插入创建者及创建时间/更新者及更新时间
 */
public function behaviors()
{
    return [
        [
        'class' => TimestampBehavior::className(),
        'value' => new Expression('NOW()'),
        ],
        BlameableBehavior::className(),
    ];
}