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Problem With Filter Logic Exercise

#1 User is offline   ismaris 

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Posted 11 April 2014 - 01:26 PM

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();
	}
    

}

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#2 User is offline   ORey 

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Posted 11 April 2014 - 05:30 PM

Line 50:
protected function loadProject(projectId)


must be
protected function loadProject($projectId)

God is real unless declared as integer
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#3 User is offline   ORey 

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Posted 11 April 2014 - 05:32 PM

Last lines:

filterProjectContext redeclared, should be removed.
God is real unless declared as integer
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#4 User is offline   ORey 

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Posted 11 April 2014 - 05:34 PM

Also configure your server to display php errors
see php.ini - display_errors, error_reporting
God is real unless declared as integer
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#5 User is offline   ismaris 

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Posted 14 April 2014 - 09:57 AM

View PostORey, on 11 April 2014 - 05:34 PM, said:

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...
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