Sort and filter data in GridView Yii2 where column is not in database

Question

If I have 2 fields in db - probability and influence and I need a column in GridView where these two fields are multiplied. I managed to add it there like:

Answer 1

Here is my solution, which works for sorting non-table field

     $dataProvider->sort->attributes['customer'] = [
        'asc' => ['customer' => SORT_ASC],
        'desc' => ['customer' => SORT_DESC],
    ];