issue with some codes in zend framework1
I am following this tutorial:Getting Started with Zend Framework 1.11
http://akrabat.com/wp-content/uploads/Getting-Started-with-Zend-Framework.pdf
, on page 12, "Listing albums"
D:\program files (x86)\Zend\Apache2\htdocs\zf-tutorial\application\models\DbTable\Albums.php
<?php
class Application_Model_DbTable_Albums extends Zend_Db_Table_Abstract {
protected $_name = 'albums';
public function getAlbum($id)
{
...
}
public function addAlbum($artist, $title)
{
...
}
public function updateAlbum($id, $artist, $title)
{
...
}
public function deleteAlbum($id)
{
...
}
}
D:\program files (x86)\Zend\Apache2\htdocs\zf-tutorial\application\controllers\IndexController.php
<?php
class IndexController extends Zend_Controller_Action
{
public function indexAction()
$albums = new Application_Model_DbTable_Albums();
$this->view->albums = $albums->fetchAll();
}
}
D:\program files (x86)\Zend\Apache2\htdocs\zf-tutorial\application\views\scripts\index\index.phtml
<?php
$this->title = "My Albums";
$this->headTitle($this->title);
?>
<p><a href="<?php echo $this->url(array('controller'=>'index',
'action'=>'add'));?>">Add new album</a></p>
<table>
<tr>
<th>Title</th>
<th>Artist</th>
<th> </th>
</tr>
<?php foreach($this->albums as $album) : ?>
<tr>
<td><?php echo $this->escape($album->title);?></td>
<td><?php echo $this->escape($album->artist);?></td>
<td>
<a href="<?php echo $this->url(array('controller'=>'index',
'action'=>'edit', 'id'=>$album->id));?>">Edit</a>
<a href="<?php echo $this->url(array('controller'=>'index',
'action'=>'delete', 'id'=>$album->id));?>">Delete</a>
</td>
</tr>
<?php endforeach; ?>
</table>
Questions:
- Albums.php, why we need this one: ?
protected $_name = 'albums'; - IndexController.php
a.we did not use include/require "Albums.php", how could we use thi class:$albums = new Application_Model_DbTable_Albums();?Application_Model_DbTable_Albums
b.what does this mean:$this->view->albums = $albums->fetchAll();? why not use$this->view->albums?$this->albums - index.phtml
a., where can I check this method:$this->url(array('controller'=>'index','action'=>'add'))?$this->url()
b. why we usehere? notforeach($this->albums as $album)as in IndexController.php?$this->view->albums
Albums.php, why we need this one: protected $_name = 'albums';?
When using a DbTable model in Zend Framework (Application_Model_DbTable_Albums) the protected member $_name must be the name of the database table that the model is associated with. The DbTable model will in effect become the database adapter for that one table.
$albums = new Application_Model_DbTable_Albums(); we did not use include/require "Albums.php", how could we use thi class:Application_Model_DbTable_Albums?
Classes and files that conform to the expected naming conventions and belong to predefined resources are automatically autoloaded by Zend_Loader. The class Application_Model_DbTable_Albums and the file Application/Model/DbTable/Albums.php both conform to the naming conventions and belong to a predefined resources.
$this->view->albums = $albums->fetchAll(); what does this mean: $this->view->albums? why not use $this->albums?
$this->view->albums = $ablums->fetchAll(); is a shorthand way of assigning the values obtained from $albums->fetchAll() to the Zend_View object for display in the view script. The values can be echoed in the view script as echo $this->albums or more likely they can be looped with a foreach and then displayed.
$this->url(array('controller'=>'index','action'=>'add')), where can I check this method: $this->url()?
This is actually a little hard to pin down easily, you'll find a basic definition in the Zend_View helper reference, just scroll down until you see it. A somewhat better example can be found in the Zend_Controller reference router section. Essentially the url() helper is the preferred method of creating a link in the view script, it is not the only method and sometimes not the best.
why we use foreach($this->albums as $album) here? not $this->view->albums as in IndexController.php?
in the controller we assign data to the view object $this->view->data = $data in the view script (index.phtml) we are in the view object so we just need to access the supplied data <?php echo $this->data ?>. In the case of $this->albums the data is a rowset object (an array of Zend_Db_Row objects) which can be iterated using a foreach loop. Most valid data types can be assigned to the view using this method.
This is a pretty simple overview of these concepts, I hope it helps.