Onchange in dropdown rendering partial a dynamic form yii2 using ajax - ajax

Question

i have a create form, Which posts value to actionCreate() like
Form - dropdown
Dynamic form depending on the dropdown above
<?php $form = ActiveForm::begin(['id' => 'dynamic-form']);?>
<?=
$form->field($model, 'techpark_id')->dropDownList($techparks, ['prompt' => '- Choose a Techpark -',
'onchange' => '
$.get( "' . Yii::$app->urlManager->createUrl('campaign-request/techpark-details?id=') . '"+$(this).val(), function( data ) {
$( "#details" ).html( data );
});
']);
?>
<div id="details">
</div>
<div class="form-group">
<?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
</div>
<?php ActiveForm::end(); ?>
Now the onchange event in the dropdown -> techpark_id will post id to campaign-request/teckpark-details
Yii::$app->urlManager->createUrl('campaign-request/techpark-details?id=7)
This actionTechparkDetails will renderPartial like this with values to dropdown list depending upon the value $id
public function actionTechparkDetails($id) {
$details = [new \app\models\CampaignRequestAdDetails];
$connection = Yii::$app->getDb();
$command = $connection->createCommand('
SELECT adspace_type_id,type,number_of_adspace,number_of_filled,adspace_value FROM `Techpark`
JOIN techpark_adspace ON techpark.id = techpark_id
JOIN adspace_type ON adspace_type_id = adspace_type.id
WHERE techpark.id=:id', [':id' => $id]);
$result = $command->queryAll();
$adspace_type_id = ArrayHelper::map($result, 'adspace_type_id', 'type');
return $this->renderAjax('_campaignDetails', [
'details' => (empty($details)) ? [new \app\models\CampaignRequestAdDetails] : $details,
'adspace_type_id' => $adspace_type_id
]);
}
campaignDetails has a dynamic form which populates the value depending on the selected dropdown() value ($id)
My _campaignDetails.php
<?php $form = ActiveForm::begin(['id' => 'dynamic-form']);?>
<div class="panel panel-default">
<div class="panel-heading"><h4><i class="glyphicon glyphicon-envelope"></i> Campaign details</h4></div>
<div class="panel-body">
<?php
DynamicFormWidget::begin([
'widgetContainer' => 'dynamicform_wrapper', // required: only alphanumeric characters plus "_" [A-Za-z0-9_]
'widgetBody' => '.container-items', // required: css class selector
'widgetItem' => '.item', // required: css class
'limit' => 20, // the maximum times, an element can be cloned (default 999)
'min' => 4, // 0 or 1 (default 1)
'insertButton' => '.add-item', // css class
'deleteButton' => '.remove-item', // css class
'model' => $details[0],
'formId' => 'dynamic-form',
'formFields' => [
'adspace_type_id',
'number_of_adspace',
],
]);
?>
<div class="container-items"><!-- widgetContainer -->
<?php foreach ($details as $i => $detail): ?>
<div class="item panel panel-default"><!-- widgetBody -->
<div class="panel-heading">
<div class="pull-right">
<button type="button" class="add-item btn btn-success btn-xs"><i class="glyphicon glyphicon-plus"></i></button>
<button type="button" class="remove-item btn btn-danger btn-xs"><i class="glyphicon glyphicon-minus"></i></button>
</div>
<div class="clearfix"></div>
</div>
<div class="panel-body">
<?php
// necessary for update action.
if (!$detail->isNewRecord) {
echo Html::activeHiddenInput($detail, "[{$i}]id");
}
?>
<div class="row">
<div class="col-sm-4">
<?= $form->field($detail, "[{$i}]adspace_type_id")->dropDownList($adspace_type_id) ?>
</div>
<div class="col-sm-4">
<?= $form->field($detail, "[{$i}]number_of_adspace")->textInput() ?>
</div>
</div><!-- .row -->
</div>
</div>
<?php endforeach; ?>
</div>
<?php DynamicFormWidget::end(); ?>
</div>
Now when i fill up the form and submit, i am unable to get the values of form (_campaignDetails.php which was rendered partially), inside actionCreate().
And also the remove item is not working in the dynamic form. Which would perfectly working if rendered inside the same form(i have another form which works fine with add/remove item of dynamic form).
I am using widget to dynamic form github.com/wbraganca/yii2-dynamicform
OR tell me how can i achieve the above scenario in any other format/manner using differnt approach. If you donot get what i want to achieve is
Depending on a dropdown value, i want a dynamic form which collects input with respect to value selected.
Thanks