how to display uploaded file in yii2 views and interact with it?

Question

I added file uploading function to my controller, file is stored in the specified directory, but views like update, index, view shows only the name of the file. I need a link or a button to interact with this uploaded file. For example opening file by pressing on this link or button also downloading this file. Could you help me with it?

Model:

public function rules()
{
    return [
    ...
        [['attachment'],'file'],
    ];
}

Controller:

public function actionCreate()
{
    $model = new Letter();

    if ($model->load(Yii::$app->request->post())) {
        $model->attachment = UploadedFile::getInstance($model, 'attachment');

        $filename = pathinfo($model->attachment , PATHINFO_FILENAME);
        $ext = pathinfo($model->attachment , PATHINFO_EXTENSION);

        $newFname = $filename.'.'.$ext;

        $path=Yii::getAlias('@webroot').'/uploads/';
        if(!empty($newFname)){
            $model->attachment->saveAs($path.$newFname);
            $model->attachment = $newFname;
            if($model->save()){
                return $this->redirect(['view', 'id' => $model->id]);
            }
        }
    }
    return $this->render('create', [
        'model' => $model,
    ]);

Form View:

<?php $form = ActiveForm::begin(['options' => ['enctype'=>'multipart/form-data']]); ?>
...

<?= $form->field($model, 'attachment')->fileInput() ?>

<div class="form-group">
    <?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
</div>

<?php ActiveForm::end(); ?>

Thanks in advance.

jithin · Accepted Answer · 2016-08-08T08:50:35.937

1

update your form view like below:

<?php $form = ActiveForm::begin(['options' => ['enctype'=>'multipart/form-data']]); ?>
...

<?= $form->field($model, 'attachment')->fileInput() ?>

 /*link to download file*/
<?if(!$model->isNewRecord):?>
<?= Html::a('Download file', ['download', 'id' => $model->id], ['class' => 'btn btn-primary']) ?>
<?endif;?>

<div class="form-group">
    <?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
</div>


<?php ActiveForm::end(); ?>

in your controller add new action for download file:

public function actionDownload($id) 
{ 
    $download = Letter::findOne($id); 
    $path=Yii::getAlias('@webroot').'/uploads/'.$download->attachment;

    if (file_exists($path)) {
        return Yii::$app->response->sendFile($path);
    }
}

in your grid view :

 <?= GridView::widget([
'dataProvider' => $dataProvider,
'id'=>'mygrid',
'columns' => [
['class' => 'yii\grid\SerialColumn'],



[
'attribute'=>'attachment',
'format'=>'raw',
'value' => function($data)
{
    return
    Html::a('Download file', ['letter/download', 'id' => $data->id], ['class' => 'btn btn-primary']);

}
],

],
]); ?>

edited Aug 08 '16 at 08:50

answered Aug 08 '16 at 04:19

jithin

920
9
17

Hi, thanks for answer. It says undefined variable $model. Should I add this as a parameter or create global variable $model = new Letter()? – Vitaly Park Aug 08 '16 at 05:34
@VitalyPark updated controller code please check it now – jithin Aug 08 '16 at 06:04
Something gets wrong with if statement in form view. The part "isNewRecord):?>" seems in view like a simple text. – Vitaly Park Aug 08 '16 at 06:54
@VitalyPark please specify that error code or message. – jithin Aug 08 '16 at 06:58
isNewRecord):?> = Html::a('Download file', ['download', 'id' => $model->id], ['class' => 'btn btn-primary']) ?> – Vitaly Park Aug 08 '16 at 07:02
something with this. Unfortunately I can't provide a screenshot of this issue. I am here using smartphone – Vitaly Park Aug 08 '16 at 07:03
are you sure your enable php short tags? – jithin Aug 08 '16 at 07:04
Sorry. I don't know. My php version is 5.6. How can I check it? – Vitaly Park Aug 08 '16 at 07:06
http://stackoverflow.com/questions/2185320/how-to-enable-php-short-tags – jithin Aug 08 '16 at 07:06
I opened this in a browser. What I have to do? – Vitaly Park Aug 08 '16 at 07:12
sry you can check this link it shows how enable short tag http://stackoverflow.com/questions/2185320/how-to-enable-php-short-tags – jithin Aug 08 '16 at 07:15
isNewRecord):?> echo Html::a('Download file', ['download', 'id' => $model->id], ['class' => 'btn btn-primary']) ?> – jithin Aug 08 '16 at 07:17
I enabled short tags, but when I press on download btn it says page not found. Also I need a link or a button to download file from grid view and in view.php. How can I implement this? – Vitaly Park Aug 08 '16 at 07:19
page not found you specify controllername/actionname in link – jithin Aug 08 '16 at 07:21
Could you provide an example? – Vitaly Park Aug 08 '16 at 07:23
= Html::a('Download file', ['controllername/download', 'id' => $model->id], ['class' => 'btn btn-primary']) ?> – jithin Aug 08 '16 at 07:24
Do I need an Internet connection to download this file even my project is local? – Vitaly Park Aug 08 '16 at 07:29
it says page not found again.. I tried as 'LetterController/download', '/LetterController/download', '/LetterController/actionDownload/download' – Vitaly Park Aug 08 '16 at 07:41
= Html::a('Download file', ['letter/download', 'id' => $model->id], ['class' => 'btn btn-primary']) ?> – jithin Aug 08 '16 at 08:08
great! It works! Please advice how can I paste this into gridview and view.php? – Vitaly Park Aug 08 '16 at 08:41
sure i can help please upvote for this answer its useful for others – jithin Aug 08 '16 at 08:45
you mean to ask as a new question? – Vitaly Park Aug 08 '16 at 09:10
no i added how gridview work. in this question answer last part – jithin Aug 08 '16 at 09:18
Oh, sorry. Didn't see this. I will try it. Thanks so much! – Vitaly Park Aug 08 '16 at 09:22
thank you it works. How can I add this url into detailview widget in view.php? – Vitaly Park Aug 09 '16 at 05:08

how to display uploaded file in yii2 views and interact with it?

1 Answers1