與復(fù)寫(xiě)
controller比較類似的功能,在config.xml的配置上有一些差異
以復(fù)寫(xiě)Captcha模塊下的Model下的Observer.php為例:
先在Model文件夾下新建Nano_App_Model_Observer類文件脊凰，繼承原有的類Mage_Captcha_Model_Observer：
<?php
/**
* Rewrite Captcha Observer because error message should be given when captcha is not correct
*/
class Nano_App_Model_Observer extends Mage_Captcha_Model_Observer
{
}
再修改app模塊的配置文件config.xml,使得復(fù)寫(xiě)生效
<models>
<nano_app>
<class>Nano_App_Model</class>
</nano_app>
<captcha>
<rewrite>
<observer>Nano_App_Model_Observer</observer>
</rewrite>
</captcha>
</models>
