Yii2 Pjax reloads the page - php

Question

I have a Pjax container in which i want to load either books or authors.My active form has two tabs by which i choose what to load. I tested my sql in phpmyadmin and they are ok(returns what expected). Tried to var_dump after each row of my controller but it seems to be ok also. But when i comes to the 'magic of the pjax' the page get reloaded. There is no errors in the console log. The response from the request in the Network tab returns the whole html. Can you take a look and give and advance?
Controller action:
public function actionSingleGenre(){
$first_step = Yii::$app->getRequest()->getQueryParam('first_step');
$second_step = Yii::$app->getRequest()->getQueryParam('second_step');
$id = end(explode('-', $second_step));
$genresPage = Page::findOne(76);
$booksPage = Page::findOne(45);
$authorsPage = Page::findOne(46);
$lang = Lang::getCurrent();
$genre = Brands::findOne($id);
$banner = CategoryImage::find()->where(['page_id' => $genresPage->id])->one();
$pageSize = 12;
$entity = 'book';
$sql = "SELECT *
FROM `product` as p
LEFT JOIN `productLang` as pl ON p.`id`=pl.`product_id`
LEFT JOIN `book_brand` as bb ON p.`id`=bb.`book_id`
WHERE bb.`brand_id`=$id";
if(Yii::$app->request->isPjax){
if(isset($_GET['type']) && $_GET['type'] != ''){
$type = $_GET['type'];
if($type == 1){
$sql = "SELECT *
FROM `product` as p
LEFT JOIN `productLang` as pl ON p.`id`=pl.`id`
LEFT JOIN `book_brand` as bb ON p.`id`=bb.`book_id`
WHERE bb.`brand_id`=$id";
}
else if($type == 2)
{
$sql = "SELECT *
FROM `author` as a
LEFT JOIN `authorLang` as al ON a.`id`=al.`author_id`
WHERE a.`id` IN (
SELECT p.`author_id`
FROM `product` as p
LEFT JOIN `book_brand` as bb ON p.`id`=bb.`book_id`
WHERE bb.`brand_id`=$id
)";
$entity = 'author';
}
}
}
$count = count(Yii::$app->db->createCommand($sql)->queryAll());
$dataProvider = new SqlDataProvider([
'sql' => $sql,
'totalCount' => $count,
'pagination' => [
'pageSize' => $pageSize,
'route' => $first_step . '/' . $second_step
]
]);
$models = $dataProvider->getModels();
$pagination = new Pagination([
'pageSize' => $pageSize,
'totalCount' => $count,
'route' => $first_step . '/' . $second_step
]);
if(Yii::$app->request->isPjax){
return $this->renderAjax('single-genre', [
'genresPage' => $genresPage,
'authorsPage' => $authorsPage,
'lang' => $lang,
'banner' => $banner,
'booksPage' => $booksPage,
'genre' => $genre,
'models' => $models,
'pagination' => $pagination,
'entity' => $entity,
]);
}
return $this->render('single-genre', [
'genresPage' => $genresPage,
'authorsPage' => $authorsPage,
'lang' => $lang,
'banner' => $banner,
'booksPage' => $booksPage,
'genre' => $genre,
'models' => $models,
'pagination' => $pagination,
'entity' => $entity,
]);
}
jQuery:
function pjaxFilterForm() {
var dataString = $("#filter-group2").serialize();
$.pjax.defaults.timeout = false;
$.pjax({
container: "#booksGrid",
url: location.href.split("?")[0],
data: dataString,
scrollTo: false
});
return false;
}
View:
<div class="filter-tags-holder">
<?php \yii\bootstrap\ActiveForm::begin([
'method' => 'get',
'action' => '#',
'options' => ['data-pjax'=>true, 'onsubmit'=>'return pjaxFilterForm()', 'id'=>'filter-group2']
]) ?>
<div id="submit-helper-tab"></div>
<input type="hidden" name="type">
<ul id="filterGenresList" class="option-set">
<li><a class="selected" data-value="1" href="#"><?= Yii::t('app', 'app.Books') ?></a></li>
<li><a data-value="2" href="#"><?= Yii::t('app', 'app.Authors') ?></a></li>
</ul>
<?php \yii\bootstrap\ActiveForm::end(); ?>
</div>
<!-- Filter Nav -->
<!-- Recommended -->
<?php \yii\widgets\Pjax::begin(['id'=>'booksGrid']) ?>
<?php if($models) : ?>
<div id="filter-masonry" class="gallery-masonry">
<?php foreach ($models as $model){
if($entity == 'book'){
$model = \backend\modules\products\models\Product::findOne($model['product_id']);
echo $this->render('_authorBooks', ['book' => $model, 'lang' => $lang, 'booksPage' => $booksPage]);
}else if($entity == 'author'){
$model = \backend\models\Author::findOne($model['author_id']);
echo $this->render('_authorGenre', ['book' => $model, 'lang' => $lang, 'authorsPage' => $authorsPage]);
}
} ?>
</div>
<div class='pagination-holder'>
<?= \yii\widgets\LinkPager::widget([
'pagination' => $pagination,
'hideOnSinglePage' => true,
'prevPageLabel' => Yii::t('app', 'app.Prev'),
'nextPageLabel' => Yii::t('app', 'app.Next')
]) ?>
</div>
<?php endif; ?>
<?php \yii\widgets\Pjax::end() ?>