Print gridview search in PDF using kartik-mPDF extension [solved]

Hey folks, I need help again. Im using kartik-mpdf library to generate pdf’s of my gridviews, the thing is I want to pass $dataProvider and $searchModel from index.php to the view that is going to be renderer as pdf document (pdf.php), So, when I search on index and click the button ‘Generar pdf’ it calls action GenerarPdf on AlumnoController and loads the same $searchModel and $dataProvider of index action into pdf.php gridview and generate the pdf file.

Here’s the code.
AlumnoController.php - actionGenerarPdf

public function actionGenerarPdf($searchModel, $dataProvider) 
        Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
        $formatter = \Yii::$app->formatter;
        $pdf = new Pdf([
            'mode' => Pdf::MODE_CORE, // leaner size using standard fonts
            'destination' => Pdf::DEST_BROWSER,
            //Se renderiza la vista "pdf" (que abrirá la nueva ventana)
            'content' => $this->renderPartial('pdf', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider
            'options' => [
            // any mpdf options you wish to set
            'methods' => [
                'SetTitle' => 'SIE: Sistema de Informacion Estudiantil',
                'SetSubject' => 'Generating PDF files via yii2-mpdf extension has never been easy',
                'SetHeader' => ['SIE: Sistema de Información Estudiantil||Generado el: ' . $formatter->asDate(date("r"))],
                'SetFooter' => ['|Página {PAGENO}|'],
                'SetAuthor' => 'SIE: Sistema de información Estudiantil',
                'SetCreator' => 'Juan Carlos Reyes Suazo',
//              'SetKeywords' => 'Sie, Yii2, Export, PDF, MPDF, Output, yii2-mpdf',
        return $pdf->render();


            if (User::isSuperAdmin(Yii::$app->user->identity->id)){
                echo Html::a('Crear Alumno', ['create'], ['class' => 'btn btn-success']); 
                echo Html::a('Ver PDF', [
                    'searchModel' => $searchModel, 
                    'dataProvider' => $dataProvider
                    'class' => 'btn btn-success', 
//    'title'=>'Will open the generated PDF file in a new window'


<?= GridView::widget([
        'dataProvider' => $dataProvider,
        'filterModel' => $searchModel,
        'columns' => [
            ['class' => 'yii\grid\SerialColumn'],
            ['attribute' => 'nombre',
             'format' => 'raw',
             'value'=>function ($data) {
                        return Html::a($data['nombre'],['alumno/view', 'id' => $data['id']]);
            ['attribute' => 'curso_id',
             'format' => 'raw',
             'value'=>function ($data) {
                        return Html::a($data['curso_id'],['curso/view', 'id' => $data['curso_id']]);
            ['attribute' => 'apoderado',
             'format' => 'raw',
             'value'=>function ($data) {
                          if ($data->apoderado_id != null)
                              return Html::a($data->apoderado->nombre, ['apoderado/view', 'id' => $data['apoderado_id']]);
                              return null;

            ['class' => ActionColumn::className(), 'template' => '{update} {delete}'],
    ]); ?>

Im getting Bad Request (#400)

Se recibieron datos erróneos para el parámetro “searchModel”

Any help would be appreciated.

You can’t pass $searchModel and $dataProvider as the query parameters to an action method, because they are not such simple variables that could be converted to simple strings.

So you have to create the search model and the data provider in your actionGenerarPdf method.

In order to get back the search parameters used in the index action, you can store the query parameters in the session and retrieve them in actionGenerarPdf.

public function actionIndex()
    $session = Yii::$app->session;
    $session['query_params'] = json_encode(Yii::$app->request->queryParams);

public function actionGenerarPdf()
    $session = Yii::$app->session;
    $queryParams = isset($session['query_params']) ? json_decode($session['query_params']) : [];

    $searchModel = new MyModelSearch();
    $dataProvider = $searchModel->search($queryParams);
1 Like

Hi @softark. Im very thankfull for your answer.

Your code is giving me the following error:

PHP Fatal Error – yii\base\ErrorException

Cannot use object of type stdClass as array

    1. in C:\xampp\htdocs\sie2gii\vendor\yiisoft\yii2\base\Model.phpat line 860
* @return bool whether `load()` found the expected form in `$data`. */ public function load($data, $formName = null) { $scope = $formName === null ? $this-&gt;formName() : $formName; if ($scope === '' &amp;&amp; !empty($data)) { $this-&gt;setAttributes($data); return true; } elseif (isset($data[$scope])) { $this-&gt;setAttributes($data[$scope]); return true; } return false; } /**

As users Nepaluz, Jon and Svens said in this thread,

I solved this adding ‘true’ into this line:

$queryParams = isset($session['query_params']) ? json_decode($session['query_params'], true) : [];

Adding the true returns the result as an array and not an stdClass

Oh, I’ve missed the 2nd parameter true. Sorry :sweat_smile:

1 Like

Nevermind. Thanks for the help :smiley: