What Is The In Put Of Cactivedataprovider

I have viewed the documentation and found such description of $modelClass: “the model class (e.g. ‘Post’) or the model finder instance (e.g. Post::model(), Post::model()->published()).”

However, when I input my "OrderDetails" models it outputs an error message:" Fatal error: Call to a member function getDbCriteria() on a non-object"

Here is my code

public function actionViewDetail($o_id){

		$order = Order::model()->findByPk($o_id);

		$dataProviderSet=new CActiveDataProvider($order->orderDetails);





orderDetails already defined in Order Class’s relations.

public function relations()


		// NOTE: you may need to adjust the relation name and the related

		// class name for the relations automatically generated below.

		return array(

			'idMember' => array(self::BELONGS_TO, 'Member', 'id_member'),

			'orderDetails' => array(self::HAS_MANY, 'OrderDetails', 'id_order'),



$order->orderDetails will return an array of objects, not an object. Depending on what you’re doing in the view, you might want to try using a CArrayDataProvider instead.