hi im new to yii, i am reading your book and i have confusing problem below is a peace of the book code in
issueController.php
/**
* Protected method to load the associated Project model class
* @project_id the primary identifier of the associated Project
* @return object the Project data model based on the primary key
*/
protected function loadProject($projectId)
{
//if the project property is null, create it based on input id
if($this->_project===null)
{
$this->_project=Project::model()->findbyPk($projectId);
if($this->_project===null)
{
throw new CHttpException(404,'The requested project does not exist.');
}
}
return $this->_project;
}
and my question is why we use
if($this->_project===null)
i think its useless. is it not better to write this? :
/**
* Protected method to load the associated Project model class
* @project_id the primary identifier of the associated Project
* @return object the Project data model based on the primary key
*/
protected function loadProject($projectId)
{
$this->_project=Project::model()->findbyPk($projectId);
if($this->_project===null)
{
throw new CHttpException(404,'The requested project does not exist.');
}
return $this->_project;
}
