Yii-控制器- filter过滤器实现步骤

指定过滤动作，（如下projectContext()方法在新建，列表，管理页面调用时使用）

public function filters()
{
	return array(
		'accessControl', // perform access control for CRUD operations
		'postOnly + delete', // we only allow deletion via POST request
		'projectContext +create index admin',
	);	
}

添加一些过滤器逻辑，定义过滤方法，过滤方法前必加filter

public function filterProjectContext($filterChain)
{
	$prijectId = null;
	if(isset($_POST['pid'])){
		$projectId = $_POST['pid'];
	}elseif(isset($_GET['pid'])){
		$projectId = $_GET['pid'];
	}
	$this->loadProject($projectId);
	$filterChain->run();
}

public function loadProject($projectid)
{
	if($this->_project === null){
		$this->_project = Project::model()->findbyPK($projectid);
		if($this->_project === null){
			throw new CHttpException(404,'请求和项目没找到！');
		}
	}
	return $this->_project;
}