Why is the data not saved?

Question

Yii

I want to save the data that came from the form, here is the method in the controller

public function actionCreate()<br>
    {<br>
        $model = new Post();<br>
        if ($model->load(\Yii::$app->request->post()) && $model->validate()) {<br>
            $model->user_id = \Yii::$app->user->getId();<br>
            $model->created_at = \Yii::$app->formatter->asDate(new \DateTime(),'php:Y-m-d');<br>
            $model->image = UploadedFile::getInstance($model, 'image');<br>
            if($model->upload()) {<br>
                $model->image = ('web/images/' . $model->image->baseName . '.' . $model->image->extension);<br>
            } else {<br>
                $model->image = null;<br>
            }<br>
            $model->save();<br>
            return $this->redirect(['site/blog']);<br>
        } else {<br>
            return $this->render('blog/create', ['model' => $model]);<br>
        }<br>
    }

and the model itself:

class Post extends ActiveRecord
{
    public $title;
    public $text;
    public $image;
    public $comments;

    public function rules()
    {
        return [
            [['title', 'text'], 'required'],
            [['image'], 'file',  'extensions' => 'png, jpg'],
        ];
    }
    public function upload()
    {

        if ($this->image->saveAs(\Yii::getAlias('@app') .'\web\images\\' . $this->image->baseName . '.' . $this->image->extension))
            return true;
        else {
            return false;
        }
    }
    public function getComments()
    {
        return $this->hasMany(Comment::className(), ['post_id' => 'id']);
    }
    public function getUser()
    {
        return $this->hasOne(User::className(),['id' => 'user_id']);
    }
}

But now, when submitting the form, only created_at, user_id and that's it. That is those fields which I set explicitly. What's wrong?

Answer 1

Why explicit declaration of attributes in a model? Remove all public attributes.

Answer 2

Good morning.
Add a method to the model

public function behaviors()
{
     return [
       TimestampBehavior::className()
    ];
}

Remove in controller
Replace
with
And at the beginning of the controller, add and remove the slash before Yii everywhere. What other fields are you passing? The image may not pass validation, so it is not saved. Highlight all the code that is responsible for loading the image into a separate model.