Reusing views with partials_Yii 1.1 Application Development Cookbook-QQ阅读男生武侠网

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Reusing views with partials

Yii supports partials, so if you have a block without much logic that you want to reuse or want to implement e-mail templates, partials are the right way to look.

Getting ready

Set up a new application using yiic webapp.

Create a WebsiteController as follows:

class WebsiteController extends CController
{
   function actionIndex()
   {
      $this->render('index');
   }
}

How to do it...

We will start with a reusable block. For example, we need to embed a YouTube video at several website pages. Let's implement a reusable template for it.

Create a view file named protected/views/common/youtube.php and paste an embed code from YouTube. You will get something like:

<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/S6u7ylr0zIg?fs=1 "></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/S6u7ylr0zIg?fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>

Now, we need to make it reusable. We want to be able to set video ID, width, and height. Let's make width and height optional, as follows:

<object width="<?php echo!empty($width) ? $width : 480?>" height="<?php echo!empty($height) ? $height: 385?>"><param name="movie" value="http://www.youtube.com/v/<?php echo $id?>?fs=1 "></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/<?php echo $id?>?fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="<?php echo !empty($width) ? $width : 480?>" height="<?php echo !empty($height) ? $height: 385?>"></embed></object>

Now, you can use it in your protected/views/website/index.php like this:
```
<?php $this->renderPartial('////common/youtube', array(
   'id' => '8Rp-CaIKvQs', // you can get this id by simply looking at video URL
   'width' => 320,
   'height' => 256,
))?>
```
Looks better, right? Note that we have used // to reference a view. This means that Yii will look for a view starting from protected/views not taking controller name into account.

Now, let's send some e-mails. As we are unable to write unique letters to thousands of users, we will use a template but will make it customized. Let's add a new method to protected/controllers/WebsiteController.php as follows:

class WebsiteController extends CController
{
   function actionSendmails()
   {
      $users = User::model->findAll();
      foreach($users as $user)
      {
         $this->sendEmail('welcome', $user->email, 'Welcome to the website!', array('user' => $user));
      }
      echo 'Emails were sent.';
   }

   function sendEmail($template, $to, $subject, $data)
   {
      mail($to, $subject, $this->renderPartial('//email/'.$template, $data, true));
   }
}

Here is our template protected/views/email/welcome.php:

Hello <?php echo $user->name?>,

Welcome to the website!

You can go check our new videos section. There are funny raccoons.

Yours,
Website team.

How it works...

CController::renderPartial does the same template processing as CController::render except the former does not use layout. As we can access current controller in a view using $this, we can use its renderPartial to use view within another view. renderPartial is also useful when dealing with AJAX as you don't need layout rendered in this case.

There's more…

For further information, refer to the following URL:

http://www.yiiframework.com/doc/api/CController/#renderPartial-detail