Yii2排序计算字段

Question

我有两个表：

订单：

- id 
- client 
- ... 

线：

- orderID 
- startDate 
- endDate 
- ... 

我的订单控制我将这两得到来自每个订单行的日期：

public function getStartDate() 
    { 
     return OrdersLines::find() 
     ->andWhere(['orderID'=>$this->id]) 
     ->min('startDate'); 
    } 

    public function getEndDate() 
    {   
     return OrdersLines::find() 
     ->andWhere(['orderID'=>$this->id]) 
     ->max('endDate'); 
    } 

在我的索引视图（使用卡尔蒂克的网格和expandRowColumn）我展示订单网格2计算列：

• 起始日期：被越早开始从行日期为每个订单
• END_DATE：从线得到更高结束日期每个订单

<?= GridView::widget([ 
     'dataProvider' => $dataProvider, 
     'filterModel' => $searchModel, 
     'export' => false, 
     'columns' => [ 
      [ 
       'class'   => 'kartik\grid\ExpandRowColumn', 
       'value'   => function ($model, $key, $index, $column) { 
        return GridView::ROW_COLLAPSED; 
       }, 
       'detail'  => function ($model, $key, $index, $column) { 
        $searchModel = new OrdersLinesSearch(); 
        $searchModel->orderID = $model->id; 
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams); 

        return Yii::$app->controller->renderPartial('_ordersLines', [ 
         'searchModel' => $searchModel, 
         'dataProvider' => $dataProvider, 
        ]); 
       }, 
      ], 
      ...    
      [ 
       'attribute' => 'start_Date', 
       'format' => 'date', 
       'label' => 'Start Date', 
       'value' => 'startDate', 

      ], 
      [ 
       'attribute' => 'end_Date', 
       'format' => 'date', 
       'label' => 'End Date', 
       'value' => 'endDate', 
      ], 

      ['class' => 'yii\grid\ActionColumn'], 
     ], 
    ]); ?> 

如何设置OrdersSearch模型以允许使用这些值进行排序（start_Date和end_Date）？

Answer 1

我认为你应该创建ActiveDataProvider在ActiveQuery使用连接，使用排序参数传递给动作：

$sort = \Yii::$app->request->get('sort'); 

if($sort == 'startDate') $having = 'MAX(startDate)'; 
if($sort == 'endDate') $having = 'MAX(endDate)'; 

$sql = Orders::find()->joinWith(['lines' => function($q) use($having) { 
    $q->having = $having; 
}]);