YII Behavior重用
用behavior的好处是可以通过“插入”的方式来获得新的功能。你当然可以直接把代码写在model里。不过如果类似的代码需要在若干个model里实现，那么behavior就可以让你重用这段代码。
1.CActiveRecordBehavior
yii框架已经提供了一个CTimestampBehavior行为类,只要设置好createAttribute和updateAttribute两个属性，，它分别对应你数据库表的创建时间和更新时间字段。像创建一篇文章时我们通常都会需要记录创建时间，更新时记录它的更新时间，详细使用，在你的Model类中behaviors方法中增加下面几行, 将createAttribute和updateAttribute更改为你数据库对应的时间字段即可:
public function behaviors(){
return array(
'CTimestampBehavior' => array(
'class' => 'zii.behaviors.CTimestampBehavior',
'createAttribute' => 'create_time_attribute',
'updateAttribute' => 'update_time_attribute',
)
);
}
XSS安全模式类
在这篇文章里，我们将描述一个基于WEB应用下避免不合法的内容注入。
我们要在一个行为里使用htmlpurifier类，用这种行为可以加强任何模型并表明各属性我们想让它们XSS安全。
我写了以下行为:
<?php
class CSafeContentBehavior extends CActiveRecordBehavior
{
public $attributes =array();
protected $purifier;
function __construct(){
$this->purifier = new CHtmlPurifier;
}
public function beforeSave($event)
{
foreach($this->attributes as $attribute){
$this->getOwner()->{$attribute} = $this->purifier->purify($this->getOwner()->{$attribute});
}
}
}
把这个类放在你的应用程序目录，例如：application/behaviors/CSafeContentBehavior.php。现在你在模型的行为中这样去写:
<?php
class Post extends CActiveRecord
{
public function behaviors(){
return array(
'CSafeContentBehavor' => array(
'class' => 'application.behaviors.CSafeContentBehavior',
'attributes' => array('title', 'body'),
),
);
}
}
现在我们可以开始了。我们的post模型在每个保存操作中将净化标题和内容列。
保存一条记录后，更新订单号,适合所有订单号
<?php
class No13Behavior extends CActiveRecordBehavior {
public $pk = '';
public $orderNo = '';
public $prefix = '';
public function afterSave($event) {
if ($this->getOwner()->getIsNewRecord()) {
if (empty($this->pk) || empty($this->orderNo) || empty($this->prefix)) {
returnfalse;
}
$id = $this->getOwner()->{$this->pk};
$val = $this->prefix . date('ymd') . str_pad($id, 5, '0', STR_PAD_LEFT);
$this->getOwner()->updateByPk($id, array($this->orderNo =>$val) );
}
}
}
2.CBehavior
自动导入module模块,config/main的modules不需要加对应的module名。可以在数据库中配置
<?php
/**
* ApplicationConfigBehavior is a behavior for the application.
* It loads additional config parameters that cannot be statically
* written in config/main
*/
class ModuleBehavior extends CBehavior {
/**
* Declares events and the event handler methods
* See yii documentation on behavior
*/
public function events() {
return array_merge(parent::events(), array(
'onBeginRequest' => 'beginRequest',
));
}
/**
* Load configuration that cannot be put in config/main
*/
public function beginRequest() {
$modules = array();
$model = Module::model()->findAll(); // Todo - should be per application
foreach ($model as $item) {
$modules[$item->name] = array(); // Todo can set parameters here for each module...
}
//$modules['video'] = array();
Yii::app()->setModules($modules);
}
}
?>
'behaviors' => array(
'theme' => 'application.components.behaviors.ThemeBehavior',
'lang' => 'application.components.behaviors.LangBehavior',
'module'=> 'application.components.behaviors.ModuleBehavior'
),
$app = Yii::createWebApplication($config);
$app->attachBehavior('module','application.components.behaviors.ModuleBehavior');
<?php
//ThemeBehavior.php
class ThemeBehavior extends CBehavior {
const COOKIE_KEY = '__theme';
public function events() {
return array_merge(parent::events(), array(
'onBeginRequest' => 'beginRequest',
));
}
public function beginRequest() {
$v = Yii::app()->request->getParam(self::COOKIE_KEY);
if (!isset($v)) {
$v = Yii::app()->request->cookies[self::COOKIE_KEY];
if (!isset($v)) {
$v = Yii::app()->theme->name;
} else {
$v = $v->value;
}
}
Yii::app()->theme = $v;
Yii::app()->request->cookies[self::COOKIE_KEY] = new CHttpCookie(self::COOKIE_KEY, $v);
}
}
<?php
//LangBehavior.php
class LangBehavior extends CBehavior {
const COOKIE_KEY = '__lang';
public function events() {
return array_merge(parent::events(), array(
'onBeginRequest' => 'beginRequest',
));
}
public function beginRequest() {
$v = Yii::app()->request->getParam(self::COOKIE_KEY);
if (!isset($v)) {
$v = Yii::app()->request->cookies[self::COOKIE_KEY];
if (!isset($v)) {
$v = Yii::app()->language;
} else {
$v = $v->value;
}
}
Yii::app()->language = $v;
Yii::app()->request->cookies[self::COOKIE_KEY] = new CHttpCookie(self::COOKIE_KEY, $v);
}
}