Yii2. Error while upload file - php

Question

My Code related is the following:
Model Rules
[['documentTypeId', 'itemId', 'name', 'document'], 'required'],
[['document'], 'file', 'skipOnEmpty' => false, 'extensions' => ['png', 'jpg', 'doc', 'pdf'], 'checkExtensionByMimeType'=>false],
Model method
public function upload($file)
{
if ($this->validate()) {
$userFolder = Yii::getAlias("#app")."/uploads/".$this->item->userId;
if(BaseFileHelper::createDirectory($userFolder) !== false) {
$fileName = uniqid(rand(), false) . '.' . $this->document->extension;
$file->saveAs($userFolder.'/' . $fileName);
$this->document = $file->name;
return true;
} else {
return false;
}
} else {
return false;
}
}
Controller
$model = new ItemDocument();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
$file = UploadedFile::getInstance($model, 'document');
if($model->upload($file) !== false) {
$model->save();
}
return $this->redirect(['view', 'id' => $model->id]);
}
return $this->render('create', [
'model' => $model,
]);
This is giving me a validation error: "Document can not be blank". If I set "Document" field as not required and submit form I get "Please upload a file."
I am uploading this through a form with some other fields.
Any ideas?

Answer 1

I have found the error it was the model->validate() on controller. When i do:
$model->load(Yii::$app->request->post())
File content is not loaded to the "document" field. Yii generates a hidden field which is empty. So I need first to do this:
$file = UploadedFile::getInstance($model, 'document');
So now my controller looks like this:
$model = new ItemDocument();
if ($model->load(Yii::$app->request->post())) {
$model->document = UploadedFile::getInstance($model, 'document');
if($model->validate()) {
if ($model->upload() !== false) {
$model->save();
}
return $this->redirect(['view', 'id' => $model->id]);
}
}
return $this->render('create', [
'model' => $model,
]);
And I removed the validation inside upload method on model. Hope it helps someone.