i have an ActiveForm, and i want to add a field where the user can upload their photos. the problem is that i don't have an attribute for the image in the users table and every input field in 'yii' expects a model and an attribute as follows.
<?= $form->field($model, 'attribute')->input($platforms) ?>
i don't want to assign the image to any record nor i want to insert in in the database, i want it to be uploaded to a specific folder.
i have also checked the library kartik wrote, but also requires an attribute field.
Follow the official documentation
https://github.com/yiisoft/yii2/blob/master/docs/guide/input-file-upload.md
Form Model
namespace app\models;
use yii\base\Model;
use yii\web\UploadedFile;
/**
* UploadForm is the model behind the upload form.
*/
class UploadForm extends Model
{
/**
* @var UploadedFile|Null file attribute
*/
public $file;
/**
* @return array the validation rules.
*/
public function rules()
{
return [
[['file'], 'file'],
];
}
}
?>
Form View
<?php
use yii\widgets\ActiveForm;
$form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
<?= $form->field($model, 'file')->fileInput() ?>
<button>Submit</button>
<?php ActiveForm::end(); ?>
Controller
Now create the controller that connects form and model together:
<?php
namespace app\controllers;
use Yii;
use yii\web\Controller;
use app\models\UploadForm;
use yii\web\UploadedFile;
class SiteController extends Controller
{
public function actionUpload()
{
$model = new UploadForm();
if (Yii::$app->request->isPost) {
$model->file = UploadedFile::getInstance($model, 'file');
if ($model->validate()) {
$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
}
}
return $this->render('upload', ['model' => $model]);
}
}
?>
Instead of model->load(...)
we are using UploadedFile::getInstance(...)
. [[\yii\web\UploadedFile|UploadedFile]]
does not run the model validation. It only provides information about the uploaded file. Therefore, you need to run validation manually via $model->validate()
. This triggers the [[yii\validators\FileValidator|FileValidator]]
that expects a file:
$file instanceof UploadedFile || $file->error == UPLOAD_ERR_NO_FILE //in code framework
If validation is successful, then we're saving the file:
$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
If you're using "basic" application template then folder uploads should be created under web.
That's it. Load the page and try uploading. Uplaods should end up in basic/web/uploads.