Problem With Filter Logic Exercise

Hi all,

I am working my way through this book in an effort to learn Yii for use on a personal website idea. So far, there have been a few typos and erroneous code examples, but it’s not been bad overall. I understand that writing a book like this is a huge effort so I do appreciate it.

My issue is with the code example within "Adding filter logic" on page 98. I have tried copy+pasting this example, manually typed, and I cannot figure why this is breaking my application. When I go to the issue controller page (index.php?r=issue) I just get a white screen. My IssueController.php is included below. I do appreciate any tips you can give me, or even if you can tell me how I can debug it myself.


<?php


class IssueController extends Controller

{


	/**

	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning

	 * using two-column layout. See 'protected/views/layouts/column2.php'.

	 */

	public $layout='//layouts/column2';


	/**

	 * @return array action filters

	 */

	public function filters()

	{

		return array(

			'accessControl', // perform access control for CRUD operations

			'postOnly + delete', // we only allow deletion via POST request

            'projectContext + create', //check to ensure valid project context

		);

	}


	/**

	 * Specifies the access control rules.

	 * This method is used by the 'accessControl' filter.

	 * @return array access control rules

	 */

	public function accessRules()

	{

		return array(

			array('allow',  // allow all users to perform 'index' and 'view' actions

				'actions'=>array('index','view'),

				'users'=>array('*'),

			),

			array('allow', // allow authenticated user to perform 'create' and 'update' actions

				'actions'=>array('create','update'),

				'users'=>array('@'),

			),

			array('allow', // allow admin user to perform 'admin' and 'delete' actions

				'actions'=>array('admin','delete'),

				'users'=>array('admin'),

			),

			array('deny',  // deny all users

				'users'=>array('*'),

			),

		);

	}


    

    

    

private $_project = null;


protected function loadProject(projectId)

{

    if($this->_project===null)

    {

        $this->_project=Project::model()->findByPk($projectID);

        if($this->_project===null)

        {

            throw new CHttpException(404,'The requested project does not exist.');

        }

    }

    

    return $this->_project;

    }

    

public function filterProjectContext($filterChain)

{

    if(isset($_GET['pid']))

        $this->loadProject($_GET['pid']);

    else

        throw new CHttpException(404,'Must specify a project before performing this action.');

        

    $filterChain->run();

}

    

    

    

    

    

	/**

	 * Displays a particular model.

	 * @param integer $id the ID of the model to be displayed

	 */

	public function actionView($id)

	{

		$this->render('view',array(

			'model'=>$this->loadModel($id),

		));

	}


	/**

	 * Creates a new model.

	 * If creation is successful, the browser will be redirected to the 'view' page.

	 */

	public function actionCreate()

	{

		$model=new Issue;


		// Uncomment the following line if AJAX validation is needed

		// $this->performAjaxValidation($model);


		if(isset($_POST['Issue']))

		{

			$model->attributes=$_POST['Issue'];

			if($model->save())

				$this->redirect(array('view','id'=>$model->id));

		}


		$this->render('create',array(

			'model'=>$model,

		));

	}


	/**

	 * Updates a particular model.

	 * If update is successful, the browser will be redirected to the 'view' page.

	 * @param integer $id the ID of the model to be updated

	 */

	public function actionUpdate($id)

	{

		$model=$this->loadModel($id);


		// Uncomment the following line if AJAX validation is needed

		// $this->performAjaxValidation($model);


		if(isset($_POST['Issue']))

		{

			$model->attributes=$_POST['Issue'];

			if($model->save())

				$this->redirect(array('view','id'=>$model->id));

		}


		$this->render('update',array(

			'model'=>$model,

		));

	}


	/**

	 * Deletes a particular model.

	 * If deletion is successful, the browser will be redirected to the 'admin' page.

	 * @param integer $id the ID of the model to be deleted

	 */

	public function actionDelete($id)

	{

		$this->loadModel($id)->delete();


		// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser

		if(!isset($_GET['ajax']))

			$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));

	}


	/**

	 * Lists all models.

	 */

	public function actionIndex()

	{

		$dataProvider=new CActiveDataProvider('Issue');

		$this->render('index',array(

			'dataProvider'=>$dataProvider,

		));

	}


	/**

	 * Manages all models.

	 */

	public function actionAdmin()

	{

		$model=new Issue('search');

		$model->unsetAttributes();  // clear any default values

		if(isset($_GET['Issue']))

			$model->attributes=$_GET['Issue'];


		$this->render('admin',array(

			'model'=>$model,

		));

	}


	/**

	 * Returns the data model based on the primary key given in the GET variable.

	 * If the data model is not found, an HTTP exception will be raised.

	 * @param integer $id the ID of the model to be loaded

	 * @return Issue the loaded model

	 * @throws CHttpException

	 */

	public function loadModel($id)

	{

		$model=Issue::model()->findByPk($id);

		if($model===null)

			throw new CHttpException(404,'The requested page does not exist.');

		return $model;

	}


	/**

	 * Performs the AJAX validation.

	 * @param Issue $model the model to be validated

	 */

	protected function performAjaxValidation($model)

	{

		if(isset($_POST['ajax']) && $_POST['ajax']==='issue-form')

		{

			echo CActiveForm::validate($model);

			Yii::app()->end();

		}

	}

    

    

    

    

    

    

    

    /**

        * Enforces filtering of Project Context

    */

    public function filterProjectContext($filterChain)

	{

		$filterChain->run();

	}

    


}



Line 50:


protected function loadProject(projectId)

must be


protected function loadProject($projectId)

Last lines:

filterProjectContext redeclared, should be removed.

Also configure your server to display php errors

see php.ini - display_errors, error_reporting

Thank you very much! I am noticing that there are a few typos in the code examples in the book…