Yii2: поиск в Gridview с использованием метода Pjax POST с разбиением на страницы

Я новичок в yii2 & Попытка поиска полей в Gridview с помощью Pjax на кнопку поиска. Я сделал это с помощью метода GET, но я хочу сделать это с помощью метода POST. Тогда как я могу сделать это с Yii2 Pjax (пост-метод) с нумерацией страниц?

Вот мой код:

_details.php:

<?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\widgets\Pjax;
use kartik\depdrop\DepDrop;$js = <<<JS
// get the form id and set the event
$('#bank-details-form').on('beforeSubmit', function(e) {
var form = $(this);
if(form.find('.has-error').length) {
return false;
}

$.ajax({
url: form.attr('action'),
type: 'post',
data: form.serialize(),
success: function(response) {
var txtValue = $("#bankdetails-bank_name").val();
if(txtValue == "")
{
alert("Please select bank name");
return false;
}

var bank_name = $('#bankdetails-bank_name option:selected').text();
var state     = $('#bankdetails-state option:selected').text();
var district  = $('#bankdetails-district option:selected').text();
var city      = $('#bankdetails-city option:selected').text();
var url       = form.attr('action')+ '&BankDetails[bank_name]='+bank_name+'&BankDetails[state]='+state+'&BankDetails[district]='+district+'&BankDetails[city]='+city;

$.pjax.reload({url: url, container:'#bank-grid'});
}
});
}).on('submit', function(e){
e.preventDefault();
});

JS;
this->registerJs($js); ?>

<div class="col-lg-5">

<?php

Pjax::begin(['id' => 'bank-form']);
$form = ActiveForm::begin(['id'  => 'bank-details-form',
'method' => 'post',
]);

if($_REQUEST['bank_name'])
{
$searchModel->bank_name = $selected;
}

// Bank level 1
echo $form->field($searchModel, 'bank_name')->widget(DepDrop::classname(), [
'data'    => $bankName,
'options' => ['placeholder' => 'Select Bank'],
'type'    => DepDrop::TYPE_SELECT2,

'select2Options'  => ['pluginOptions'=>['allowClear'=>true]],
'pluginOptions'   => [
'depends'     => [''],
'url'         => Url::to(['/students/child-account']),
]
]);

// State level 2
echo $form->field($searchModel, 'state')->widget(DepDrop::classname(), [
'type'    => DepDrop::TYPE_SELECT2,
'data'    => $bankState,
'options' => ['placeholder'=>'Select State'],

'select2Options'  => ['pluginOptions'=>['allowClear'=>true]],
'pluginOptions'   => [
'depends'     => ['bankdetails-bank_name'],
'url'         => Url::to(['/students/child-account']),
'loadingText' => 'Select Bank',
]
]);

// District level 3
echo $form->field($searchModel, 'district')->widget(DepDrop::classname(), [
'data'    => $bankState,
'options' => ['placeholder' => 'Select District'],
'type'    => DepDrop::TYPE_SELECT2,

'select2Options'  => ['pluginOptions'=>['allowClear'=>true]],
'pluginOptions'   => [
'depends'     => ['bankdetails-state'],
'url'         => Url::to(['/students/auto-populate-districts']),
'loadingText' => 'Select District',
]
]);

// City level 4
echo $form->field($searchModel, 'city')->widget(DepDrop::classname(), [
'data'    => $bankCity,
'options' => ['placeholder' => 'Select City'],
'type'    => DepDrop::TYPE_SELECT2,

'select2Options'  => ['pluginOptions'=>['allowClear'=>true]],
'pluginOptions'   => [
'depends'     => ['bankdetails-district'],
'url'         => Url::to(['/students/auto-populate-cities']),
'loadingText' => 'Select City',
]
]);

?>

<div class="form-group"><br/>
<?= Html::submitButton('Search', ['class' => 'btn btn-success']) ?>
</div>

<?php ActiveForm::end();
Pjax::end(); ?>

</div>