Print gridview search in PDF using kartik-mPDF extension - yii2

Question

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 $pdf->render();
}
index.php
<p>
<?php
if (User::isSuperAdmin(Yii::$app->user->identity->id)){
echo Html::a('Crear Alumno', ['create'], ['class' => 'btn btn-success']);
echo Html::a('Ver PDF', [
'/alumno/generar-pdf',
'searchModel' => $searchModel,
'dataProvider' => $dataProvider
],
[
'class' => 'btn btn-success',
'target'=>'_blank',
'data-toggle'=>'tooltip',
// 'title'=>'Will open the generated PDF file in a new window'
]);
}
?>
</p>
pdf.php
<?= GridView::widget([
'dataProvider' => $dataProvider,
'filterModel' => $searchModel,
'columns' => [
['class' => 'yii\grid\SerialColumn'],
//'id',
['attribute' => 'nombre',
'format' => 'raw',
'value'=>function ($data) {
return Html::a($data['nombre'],['alumno/view', 'id' => $data['id']]);
},
],
//'rut',
['attribute' => 'curso_id',
'format' => 'raw',
'value'=>function ($data) {
return Html::a($data['curso_id'],['curso/view', 'id' => $data['curso_id']]);
},
],
//'fecha_nacimiento',
//'fono',
//'direccion',
//'email:email',
//'apoderado',
['attribute' => 'apoderado',
'format' => 'raw',
'value'=>function ($data) {
if ($data->apoderado_id != null)
return Html::a($data->apoderado->nombre, ['apoderado/view', 'id' => $data['apoderado_id']]);
else
return null;
},
],
//'apoderado_suplente',
//'fono_apoderado',
//'fono_apoderado_sup',
//'antecedentes_medicos',
//'grupo_sanguineo',
//'programa_integracion',
//'taller_artistico',
//'anotaciones',
['class' => ActionColumn::className(), 'template' => '{update} {delete}'],
],
]); ?>
Im getting Bad Request (#400)
Se recibieron datos erróneos para el parámetro “searchModel”
Any help would be appreciated.

Answer 1

I solved this by using sessions, and I generated $searchModel and $dataProvider in actionGenerarPdf instead of sending them by a button.
I'll quote #softark from yii forum
"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."
https://forum.yiiframework.com/t/print-gridview-search-in-pdf-using-kartik-mpdf-extension-solved/124925
Here's the code
public function actionIndex()
{
$searchModel = new AlumnoSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
$session = Yii::$app->session;
$session->open();
$session['query_params'] = json_encode(Yii::$app->request->queryParams);
$session->close();
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
]);
}
public function actionGenerarPdf()
{
$session = Yii::$app->session;
$session->open();
$queryParams = isset($session['query_params']) ? json_decode($session['query_params'], true) : [];
$session->close();
$searchModel = new AlumnoSearch();
$dataProvider = $searchModel->search($queryParams);
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
'defaultFontSize' => 18,
'orientation' => Pdf::ORIENT_PORTRAIT,
'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();
}
I hope this helps others who want to achieve the same