Yii2 max_size validation issue - validation

Question

This is my action:
public function actionCustom() {
$model = new Custom();
$model->load(\Yii::$app->request->post());
if ($model->validate()) {
// emptying the model's data
$model = new Custom();
var_dump('good');
} else {
var_dump('bad');
}
var_dump($_FILES);
return $this->render('custom', [
'model' => $model
]);
}
And this is my model:
class Custom extends Model
{
public $file;
public function rules()
{
return [
// ['file', 'file', 'extensions' => ['png', 'jpg', 'jpeg', 'gif', 'txt'], 'maxSize' => 1024 * 100]
['file', 'file', 'maxSize' => 1024 * 100],
];
}
}
When I try to upload a file which size exceeds the maxSize rule I set, the client-side validation displays an error and I can't submit the form by clicking on the button and this is all fine, but I can force submitting by typing something like this in the console like how a hacker would do:
document.forms[0].submit()
And I get this output:
C:\wamp64\www3\controllers\SiteController.php:138:string 'good' (length=4)
C:\wamp64\www3\controllers\SiteController.php:143:
array (size=1)
'Custom' =>
array (size=5)
'name' =>
array (size=1)
'file' => string 'tste.txt' (length=8)
'type' =>
array (size=1)
'file' => string 'text/plain' (length=10)
'tmp_name' =>
array (size=1)
'file' => string 'C:\wamp64\tmp\phpDE60.tmp' (length=25)
'error' =>
array (size=1)
'file' => int 0
'size' =>
array (size=1)
'file' => int 818064
string 'good' means that the file has passed the validation, but how?! The size of the file I sent was 818064 and it is bigger than 102400 (1024 * 100) file size limit which I set.
What am I doing wrong?

Answer 1

Have you tried to use yii\web\UploadedFile::getInstance() method mentioned in the official docs example?
$model = new UploadForm();
if (Yii::$app->request->isPost) {
$model->imageFile = UploadedFile::getInstance($model, 'imageFile');
if ($model->upload()) {
// file is uploaded successfully
return;
}
}
http://www.yiiframework.com/doc-2.0/guide-input-file-upload.html#wiring-up