php - Error in creating a simple form in Yii framework

Hello guys I am new to Yii framework. Before I am using CodeIgniter as my framework. And now I decided to switch to Yii. Because of its amazing features. But I am having a hard time in studying it. Now I am creating a simple form from scratch. I didn't use the gii tool.
My problem is if I included a textbox the output is an exception. Here it is.

CException

Property "ContactForm.username" is not defined.


C:\xampp\htdocs\yii\framework\web\helpers\CHtml.php(2529)

I don't know what does it mean. i guess I need to declare the input's name. But how?

Here's my code

Controller

    class BlogController extends Controller {

        public function actionIndex() {

            $model = new ContactForm;

            $this->render('index', array( 'model' => $model ));

        }


    }

?>

Model

    class Blog extends CFormModel {

        public $username;

        public function rules() {

            return array (

                array ( 'username', 'required' ),


            );

        }

    }

?>

View

    $this->breadcrumbs = array (
        'Blog',
    );

?>



    

        

        

            
             
        

    

Answer

Property "ContactForm.username" is not defined.

It means your ContactForm doesn't have a username property. So you have to define username property in your ContactForm.

class Blog extends CFormModel {


        public $username;

        public function rules() {

            return array (

                array ( 'username', 'required' ),

            );


        }

    }

As I see, you defined username in your Blog model.

BTW, I guess you want to use Blog model instead of ContactForm in actionIndex():

    class BlogController extends Controller {

        public function actionIndex() {

            $model = new Blog;

            $this->render('index', array( 'model' => $model ));


        }

    }

?>