beforeDelete

<?php
class NewsImage extends AppModel {
	var $name = 'NewsImage';

	var $belongsTo = array(
		'News' => array(
			'className' => 'News',
			'foreignKey' => 'news_id',
			'conditions' => '',
			'fields' => '',
			'order' => ''
		)
	);
	
	function beforeDelete(){
		$this->data = $this->findById($this->id);
		return true;
	}
	
	function afterDelete() {
		$filePath = WWW_ROOT.'img/'.$this->data["NewsImage"]["url"];
		unlink($filePath);
		return true;
	}
}
?>