乘法列的GridView yii2

Question

如何coulld乘两个属性从模型这样['value' => ('items.order_items_quantity' * 'items.order_items_initialPrice')],

Answer 1

[ 
    ... 
    'value' => function($data) { 
     return ($data->order_items_quantity * $data->order_items_initialPrice); 
    } 
] 

Answer 2

[ 
    'attribute' => 'column1', 
    'value' => function ($data, $key, $index, $column) { 
     return $data->column1 * $data->column2; 
    }, 
]