Updating Image in Yii2 - yii2

Question

While updating image using Yii2 I'm facing a problem with the validation.Its always asking me to upload an image. But I don't want this. Always updating an image is not necessary.
I tried skipOnEmpty but its not working properly it cause effect while uploading a photo, which is also incorrect.
Please help!!
Model
public function rules()
{
return [
[['carid', 'name'], 'required'],
[['carid', 'coverphoto', 'status'], 'integer'],
[['name'], 'string', 'max' => 200],
[['imageFiles'], 'image','extensions' => 'png, jpg, jpeg, gif', 'maxFiles' => 4, 'minWidth' => 100, 'maxWidth' => 800, 'minHeight' => 100, 'maxHeight'=>600,'skipOnEmpty' => true],
];
}
Controller
public function actionUpdate($id)
{
$model = $this->findModel($id);
if ($model->load(Yii::$app->request->post()) && $model->save()) {
return $this->redirect(['view', 'id' => $model->photoid]);
} else {
return $this->render('update', [
'model' => $model,
]);
}
}

Answer 1

You should to use scenario for update.
Like as,
Add on condition in model's rule for applying scenario .
[['imageFiles'], 'image','extensions' => 'png, jpg, jpeg, gif', 'maxFiles' => 4, 'minWidth' => 100, 'maxWidth' => 800, 'minHeight' => 100, 'maxHeight'=>600,'skipOnEmpty' => true, 'on' => 'update-photo-upload'],
And use that scenario in controller's action.
public function actionUpdate($id)
{
$model = $this->findModel($id);
$model->scenario = 'update-photo-upload';
........
.....
}

Answer 2

try rule as
[
['imageFiles'], 'file',
'extensions' => 'png, jpg, jpeg, gif',
'mimeTypes' => 'image/jpeg, image/png',
'maxFiles' => 4,
'minWidth' => 100,
'maxWidth' => 800,
'minHeight' => 100,
'maxHeight'=>600,
'skipOnEmpty' => true
],
This is working in my case, hope it works for you too.

Answer 3

**Your View Like This**
<?php use yii\widgets\ActiveForm;?>
<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>
<?= $form->field($model, 'imageFiles')->fileInput() ?>
<div class="form-group">
<?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
</div>
<?php ActiveForm::end() ?>
*** Your Controller Like This******
use Yii;
use yii\web\Controller;
use app\models\UploadForm;
use yii\web\UploadedFile;
class SiteController extends Controller
{
public function actionUpdate()
{
$model = new UploadForm ();
$model->scenario = 'update';
if (Yii::$app->request->isPost) {
$model->imageFiles= UploadedFile::getInstance($model, 'imageFiles');
if ($model->upload()) {
// file is uploaded successfully
return;
}
}
return $this->render('update', ['model' => $model]);
}
}
***** Your ModelLike This ******
use yii\base\Model;
use yii\web\UploadedFile;
class UploadForm extends Model
{
/**
* #var UploadedFile[]
*/
public $imageFiles;
public function rules()
{
return [
[['carid', 'name'], 'required'],
[['carid', 'coverphoto', 'status'], 'integer'],
[['name'], 'string', 'max' => 200],
[['imageFiles'], 'file', 'skipOnEmpty' => false, 'extensions' => 'png, jpg', 'maxFiles' => 4,'on'=>'update'],
];
}
public function upload()
{
if ($this->validate()) {
foreach ($this->imageFiles as $file) {
$file->saveAs('uploads/' . $file->baseName . '.' . $file->extension);
}
return true;
} else {
return false;
}
}
function scenario()
{
return [
'create' => ['imageFiles ', 'carid','name','coverphoto','status'],
'update' => ['imageFiles ', 'carid','name','coverphoto','status'],
];
}
}