I’m trying to create a form to edit some data, and I am getting the following error:
Creating default object from empty value
when I try to submit the form. The error is at $resource->title = $this->title (see model code below). I don’t know what’s going on, because I’ve never had this problem before. I looked up Creating default object from empty value and Creating default object from empty value and Yii2 - Creating default object from empty value but neither of these helped.
Relevant code is attached below.
Inside controller:
<?php
namespace app\modules\studyshare\controllers;
use Yii;
use yii\web\Controller;
use common\models\Resource;
use common\models\ElementLink;
use common\models\ElementLinkForm;
use common\models\CreateNewElementTextForm;
class CreateController extends Controller
{
public function actionNewElementLink($action = 'create', $id = null)
{
$model = new ElementLinkForm();
...
if (($action == 'edit') && ($id != null))
{
$resource = Resource::findOne($id);
$elementLink = ElementLink::findOne($id);
if (($model->load(Yii::$app->request->post())) && ($model->editElementLink()))
{
return $this->redirect(['main/index']);
}
else
{
$model->title = $resource->title;
$model->description = $resource->description;
$model->copyright = $resource->copyright;
$model->editing = $resource->editing;
$model->path = $elementLink->path;
$model->id = $id;
}
}
...
return $this->render('newElementLink', [
'model' => $model,
'id' => $id,
'action' => $action,
]);
In view:
<?php
use macgyer\yii2materializecss\widgets\form\ActiveForm;
use yii\helpers\Html;
$this->title = "Create New Element Link";
?>
<div class = "row">
<div class = "col m6 push-m3 card">
<div class = "card-content">
<h1>Element Link (<?= $action ?>)</h1>
<?php $form = ActiveForm::begin(); ?>
<?= $form->field($model, 'path')->textInput(['autofocus' => true]) ?>
<?= $form->field($model, 'title') ?>
<?= $form->field($model, 'description')->textarea() ?>
<?= $form->field($model, 'copyright') ?>
<?= $form->field($model, 'editing')
->dropdownList([
1 => 'Myself Only',
3 => 'Anyone on MHC',
]) ?>
<?= Html::activeHiddenInput($model, 'id', ['value' => $id]) ?>
<small>Note that regardless of which editing option you choose, each element is editable by MHC Admins and Team members.</small>
<br /><br />
<div class="form-group">
<?= Html::submitButton('<i class = "material-icons right">arrow_forward</i>Go', ['class' => 'btn text-white', 'name' => 'element-link-button']) ?>
</div>
<?php ActiveForm::end(); ?>
</div>
</div>
</div>
In model:
<?php
namespace common\models;
use Yii;
use yii\base\Model;
use common\models\ElementLink;
use common\models\Resource;
/**
* is the model behind the contact form.
*/
class ElementLinkForm extends Model
{
public $title;
public $description;
public $copyright;
public $editing;
public $path;
public $id;
/**
* {@inheritdoc}
*/
public function rules()
{
return [
[['title', 'copyright', 'editing', 'path'], 'required'],
[['title', 'description', 'copyright', 'editing', 'path', 'id'], 'trim'],
['title', 'string', 'min' => 2, 'max' => 255],
['description', 'string', 'max' => 500],
['copyright', 'string', 'min' => 2, 'max' => 255],
['editing', 'integer'],
['path', 'string', 'min' => 5, 'max' => 2000],
['id', 'integer']
];
}
/**
* {@inheritdoc}
*/
public function attributeLabels()
{
return [
'path' => "Web Link"
];
}
public function createNewElementLink()
{
$time = date('Y-m-d H:m:s', time());
$resource = new Resource();
$resource->type = 2;
$resource->added_by_type = 1;
$resource->added_by = Yii::$app->user->identity->id;
$resource->title = $this->title;
$resource->description = $this->description;
$resource->copyright = $this->copyright;
$resource->editing = $this->editing;
$resource->approval = 1;
$resource->created_at = $time;
$resource->updated_at = $time;
$resource->save();
$id = Resource::find()
->where([
'added_by' => Yii::$app->user->identity->id,
'created_at' => $time,
])
->one();
$link = new ElementLink();
$link->id = $id['id'];
$link->path = $this->path;
return $link->save();
}
public function editElementLink()
{
$time = date('Y-m-d H:m:s', time());
$resource = Resource::find($this->id);
$resource->title = $this->title;
$resource->description = $this->description;
$resource->copyright = $this->copyright;
$resource->editing = $this->editing;
$resource->updated_at = $time;
$link = ElementLink::findOne($this->id);
$link->path = $this->path;
return $link->save() && $resource->save();
}
}
Thanks!