How to add grand total to the bottom of yii2 grid view - php

Question

I have a grid view which is like this. The columns are calculated with the help of MySQL query and displayed accordingly.
<?php
$subquery = Adanalytics::find()->
select('id,ad_id,date_event,max(cpc) cpclick,max(cpv) cpview,max(impression) impression,max(view) view,max(clicks) clicks,visitor_ip,publisher_id')->
from('ad_analytics')->
where(['publisher_id' => Yii::$app->user->identity->id ])->
groupBy('ad_id,date_event,visitor_ip');
$query=Adanalytics::find()->
select('ad_id,date_event,sum(cpclick) total_click_cost,sum(cpview) total_view_cost,sum(impression) total_impression,sum(view) total_views,sum(clicks) total_clicks,publisher_id')->
from(['t'=>$subquery])->
groupBy('t.ad_id,t.date_event');
?>
<?= GridView::widget([
'dataProvider'=>new ActiveDataProvider([
'query' => $query,
]),
'filterModel' => $searchModel,
'columns' => [
['class' => 'yii\grid\SerialColumn'],
'ad_id',
'total_impression',
'total_views',
'total_clicks',
'total_click_cost',
'total_view_cost',
'date_event',
['class' => 'yii\grid\ActionColumn'],
],
]); ?>
I want to show a grand total column at the bottom of this grid view.
For example
'grand_total_impression',
'grand_total_views', //This is the sum of all displayed views
'grand_total_clicks',//This is the sum of all displayed clicks
'grand_total_click_cost',//THis is the sum of all displayed cost
'grand_total_view_cost',//This is the sum of all displayed view cost
To do that I have code in my controller which is like this.
public function actionIndex()
{
$searchModel = new Adanalytics2Search();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
$grandTotal = [];
foreach ($dataProvider->getModels() as $value) {
// var_dump($value);
// exit();
$grandTotal['total_click_cost'] += $value['total_click_cost'];
$grandTotal['total_view_cost'] += $value['total_view_cost'];
}
//var_dump($dataProvider);
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
'grandTotal' => $grandTotal,
]);
}
But it is producing the error in at this way.
Undefined index: total_click_cost
Where am I going wrong? Or is there any other way to solve this problem?

Answer 1

I strongly advise you to use katrik gridview. It handles page summary much better and implements a lot of other usages. Alternatively add 'showPageSummary' => true at your gridview to display columns summary.

Answer 2

use kartik\grid\GridView;
// Create a panel layout for your GridView widget
echo GridView::widget([
'dataProvider'=> $dataProvider,
'filterModel' => $searchModel,
'columns' => $gridColumns,
'showPageSummary' => true
]);
Similar question: Yii2: Kartik Gridview sum of a column in footer

Answer 3

This has solved the problem anyway.
This in grid column.
[
'attribute'=>'total_impression',
'pageSummary' => true
],
And in grid view
'showPageSummary' => true,