Yii2: Call to a member function saveAs() on null while uploading multiple file

Question

While uploading multiple file getting this error:

When I put [['file'], 'file', 'maxFiles' => 4],in model getting following error:

Call to a member function saveAs() on null

But when I put this [['file'], 'file'], in model, its uploading.

Why am I getting error?

View:

<?php  echo $form->field($model,'file[]')->label(false)->widget(FileInput::classname(), 
                          [
                          'options'=>['accept'=>'image/*', 'multiple'=>true],
                          'pluginOptions'=>['allowedFileExtensions'=>['jpg','gif','png']
                          ]]);  
                      ?>

Controller:

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

        if ($model->load(Yii::$app->request->post()))
        {
            $imageName = $model->room_type;
            $model->file = UploadedFile::getInstance($model, 'file');
            $model->file->saveAs( 'uploads/room_img/'.$imageName.'.'.$model->file->extension);
            //save the path in the db column
            $model->images = 'uploads/room_img/'.$imageName.'.'.$model->file->extension;
            $model->save();
            return $this->redirect(['view', 'id' => $model->id]);
        } 
        else 
        {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

$model is null, are you creating the object properly on the controller? — Danyal Sandeelo
– Danyal Sandeelo, Commented Feb 10, 2016 at 14:58

Salem Ouerdani · Accepted Answer · 2016-02-10 19:32:51Z

1

Use getInstances instead of getInstance as according to their respective documentations, the first returns all uploaded files for a given model attribute while the second is designed to return a single one. Then loop and save them one by one :

if ($model->load(Yii::$app->request->post())) { 
     $imageName = $model->room_type;

     $model->imageFiles = UploadedFile::getInstances($model, 'imageFiles');

     $all_files_paths = [];

     foreach ($model->imageFiles as $file_instance) {
        // this should hold the new path to which your file will be saved
        $path = 'uploads/room_img/' . $file_instance->baseName . '.' . $file_instance->extension;

        // saveAs() method will simply copy the file 
        // from its temporary folder (C:\xampp\tmp\php29C.tmp) 
        // to the new one ($path) then will delete the Temp File
        $file_instance->saveAs($path);

        // here the file should already exist where specified within $path and 
        // deleted from C:\xampp\tmp\ just save $path content somewhere or in case you need $model to be
        // saved first to have a valid Primary Key to maybe use it to assign
        // related models then just hold the $path content in an array or equivalent :
        $all_files_pathes []= $path;
     }

     $model->save();

     /*
        after $model is saved there should be a valid $model->id or $model->primaryKey
        you can do here more stuffs like :

        foreach($all_files_pathes as $path) {
            $image = new Image();
            $image->room_id = $model->id;
            $image->path = $path;
            $image->save();
        }
     */

     return $this->redirect(['view', 'id' => $model->id]);
 }

See docs for more info.

edited Feb 10, 2016 at 19:32

answered Feb 10, 2016 at 16:40

Salem Ouerdani

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9 Comments

JKLM Over a year ago

Getting unknown property: backend\controllers\RoomTypesController::imageFiles getting this error

Salem Ouerdani Over a year ago

I just updated. should be $model->file instead of $this->file as you are doing it inside controller and not inside model like in official docs. and file instead of 'imageFiles'. my bad !

JKLM Over a year ago

while saving finfo_file(C:\xampp\tmp\php90FA.tmp): failed to open stream: No such file or directory getting this error

JKLM Over a year ago

if ($model->load(Yii::$app->request->post()))         {             $imageName = $model->room_type;             $model->imageFiles = UploadedFile::getInstances($model, 'imageFiles');              foreach ($model->imageFiles as $file_instance)              {                  $file_instance->saveAs('uploads/room_img/' . $file_instance->baseName . '.' . $file_instance->extension);                    $model->save();             }                            return $this->redirect(['view', 'id' => $model->id]);                     }

here is the create action

Salem Ouerdani Over a year ago

hi again. why are u doing $model->save() inside the foreach loop ? $model is a single instance. $model->imageFiles is containing files instances through which we loop and we do saveAs($path) to each of them. and about the previous error it is normal as tmp folder will be cleaned after saving your file. I'll do an update

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