Yii2 Grid Jeasyui - Controller

public function actionGetData()
    {
        $request = Yii::$app->request;
        Yii::$app->getResponse()->format = 'json';
        $query = (new \yii\db\Query())
            ->select('m_unit.*, m_people.*')
            ->from("m_people")
        ->leftJoin('m_unit', 'm_unit.id = unit_id');
        // searching
        if (($q = $request->post('q'))) {
        }

        if (($request->post('searchtype') == 'str')) {
            $query->andFilterWhere(['like', 'LOWER(' . $request->post('searchdata') . ')', strtolower($request->post('searchvalue'))]);
        } else if (($request->post('searchtype') == 'int')) {
            $query->andFilterWhere([$request->post('searchdata') => $request->post('searchvalue')]);
        }

        // sorting
        if (($sort = $request->post('sort'))) {
            $order = $request->post('order', 'asc');
            $query->orderBy([$sort => $order == 'asc' ? SORT_ASC : SORT_DESC]);
        } else {
        }

        // paging
        $limit = $request->post('rows', 15);
        $page = $request->post('page', 1);
        $total = $query->count();
        $query->offset(($page - 1) * $limit)->limit($limit);
        return [
            'total' => $total,
            'rows' => $query->all(),
        ];
    }