bedezign\yii2\audit\models\AuditTrailSearch::rules PHP Method

    public function rules()
    {
        // Note: The model is used by both the entry and the trail index pages, hence the separate use of `id` and `entry_id`
        return [[['id', 'user_id', 'entry_id', 'action', 'model', 'model_id', 'field', 'created'], 'safe']];
    }