Get data from selected checkboxes in yii2 - yii2

Question

I have a form rawmaterial and in that I've a Gridview with checkboxcolumn and some form fields. I want to get all the fields of the selected rows as array.
I've tried to solve as mentioned here - http://www.yiiframework.com/forum/index.php/topic/53777-gridview-get-selected-colum/. But getting Not Found error.
Code of index.php
<?php
use yii\helpers\Html;
use kartik\grid\GridView;
use kartik\select2\Select2;
use yii\helpers\ArrayHelper;
use frontend\models\Rmtemplate;
use kartik\form\ActiveForm;
/* #var $this yii\web\View */
/* #var $searchModel frontend\modules\rmprod\models\RmtemplateSearch */
/* #var $dataProvider yii\data\ActiveDataProvider */
$this->title = 'Templates';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="rmtemplate-index">
<?php $form = ActiveForm::begin([
'id' => 'rmtemplate-index',
'action' => ['/rmprod/Rmtemplate/processSelected',],
'method' => 'get',
'enableClientScript' => false,
]); ?>
<h1><?= Html::encode($this->title) ?></h1>
<?php // echo $this->render('_search', ['model' => $searchModel]); ?>
<?= GridView::widget([
'dataProvider' => $dataProvider,
'filterModel' => $searchModel,
'id'=>'mytable',
'columns' => [
['class' => 'kartik\grid\CheckboxColumn'],
//'id',
//'productname',
[
'attribute'=>'productname',
'filterType'=>GridView::FILTER_SELECT2,
'filter'=>ArrayHelper::map(Rmtemplate::find()->orderBy(['productname' => SORT_ASC])->asArray()->all(), 'productname', 'productname'),
'filterWidgetOptions'=>[
'pluginOptions'=>['allowClear'=>true],
],
'filterInputOptions'=>['placeholder'=>'Charge Name'],
],
'rmname',
'qty',
// [
// 'attribute' => 'unitcost',
// 'value' => 'unitcost.unitcost',
// ],
'cost',
//['class' => 'kartik\grid\ActionColumn'],
],
]); ?>
<div class="form-group pull-right">
<?= Html::submitButton('Next', ['class' => 'btn btn-primary search','id'=>'tabbutton',]) ?>
</div>
</div>
<?php ActiveForm::end(); ?>
<?php
/* start getting the data */
$script = <<<EOD
$('tabbutton').one('click',function() {
var keys = $('#w0').yiiGridView('getSelectedRows'); // returns an array of pkeys, and #grid is your grid element id
$.post({
url: '/rmtemplate/processSelected', // your controller action
dataType: 'json',
data: {keylist: keys},
success: function(data) {
if (data.status === 'success') {
alert('I did it! Processed checked rows.');
}
},
});
});
EOD;
$this->registerJs($script);
/*end getting the data */
?>
Controller Action
public function actionProcessSelected() {
if (isset($_POST['keylist'])) {
$keys = \yii\helpers\Json::decode($_POST['keylist']);
// you will have the array of pk ids to process in $keys
// perform batch action on these keys and return status
// back to ajax call above
}
}
Console
Output

Answer 1

Give an id to the GridView like:
<?= GridView::widget([
'id'=>'mytable',
...
And in your js code, call this:
var rows = $('#mytable').yiiGridView('getSelectedRows');

Answer 2

There are two possible(Temporary) soutions you can try:
Solution 1::
In Index.php=>
//define action ::
$productupdate = '/rmprod/Rmtemplate/processSelected';
In column add this........
[
'class' => 'kartik\grid\CheckboxColumn'
'checkboxOptions' => function ($data) {
return ['value' => $data['product_primary_key'], 'class' => 'class_checkbox']; //primary_key=>product_primary_key
},
],
Add Jquery code(To post data) ::::
$('.class_checkbox').change(function()
{
var action_url = '<?= $productupdate; ?>';
if (this.checked) {
var product_data = $(this).attr('value'); //get product_primary_key
$.ajax({
method: "post",
url: action_url,
data: {product_data:product_data,_csrf: csrfToken}
}).done(function(data)
{
$('#LoadingMSG').hide();
console.log(data);
});
}
else
{
//you can apply another ajax to post data when checkbox unselect
}
});
In Controller=>
public function processSelected()
{
$getdata = Yii::$app->request->post(); //get posted data
//apply query to play with database by $getdata (primary_key)
}
Solution 2
In Index.php.............
[
'class' => 'kartik\grid\CheckboxColumn'
'checkboxOptions' => function ($data) {
return ['value' => $value1.'+'.$value2.'+'.$value3.'+'.$value4, 'class' => 'class_checkbox'];
},
],
Add Jquery code(To post data) ::::
$('.class_checkbox').change(function()
{
var action_url = '<?= $productupdate; ?>';
if (this.checked) {
var all_flds_data = $(this).attr('value');
$.ajax({
method: "post",
url: action_url,
data: {all_flds_data:all_flds_data,_csrf: csrfToken}
}).done(function(data)
{
$('#LoadingMSG').hide();
console.log(data);
});
}
else
{
//you can apply another ajax to post data when checkbox unselect
}
});
In Controller=>
public function processSelected()
{
$getdata = Yii::$app->request->post(); //get posted data
//after json_deocode you will get all posted data from ajax
}