Zend_Paginator for Categories - zend-framework

Question

I have used Zend_Paginator in my Index action , this show all my catalog :
public function indexAction()
{
Zend_View_Helper_PaginationControl::setDefaultViewPartial('/pagination.phtml');
$pages = new Application_Model_DbTable_Catalog();
$num = 10;
$page = $this->_getParam('page');
$select = $pages->select();
$result = $this->view->table = $pages->fetchAll($select)->toArray();
$paginator = new Zend_Paginator(new Zend_Paginator_Adapter_Array($result));
$paginator->setItemCountPerPage($num);
$paginator->setCurrentPageNumber($page);
$paginator->setView($this->view);
$this->view->paginator = $paginator;
}
It works perfectly, now I have CategoryAction, it's sort my catalog by category
public function categoryAction()
{
$id = intval($this->_getParam('id', 0));
if ($id > 0) {
$catalog = new Application_Model_DbTable_Catalog();
$this->view->catalog = $catalog->getByCategoryId($id);
и
$category = new Application_Model_DbTable_Categories();
$this->view->category = $category->getById($id);
}
So I can't understand how to add Pagination to this action,
Help me, Pleaaasssseeeeeee:-(,
P.S. sorry for my bad English

Answer 1

Ok there is a better/easier way to do this.
Pagination starts with your database query. You are using DbTable models so it's very easy in ZF1 to setup the adapter.
<?php
class Application_Model_DbTable_Catalog extends Zend_Db_Table_Abstract
{
protected $_name = 'catalog'
/*
* This method returns a paginator adapter with a fetchAll($where = null, $order = null, $count = null, $offset = null)
* paginator adapter will supply the values for $offset and $limit
*/
public function getPagedCatalog()
{
$select = $this->select(); //put anything you need into $select
$adapter = new Zend_Paginator_Adapter_DbTableSelect($select);//the paginator adapter in place of the fetchAll().
return $adapter;
{
}
<?php
class Application_Model_DbTable_Categories extends Zend_Db_Table_Abstract
{
protected $_name = 'categories'
/*
* This method returns a paginator adapter with a fetchAll($where = $id, $order = null, $count = null, $offset = null)
* paginator adapter will supply the values for $offset and $limit
*/
public function getPagedCatagories($id)
{
$select = $this->select(); //put anything you need into $select
$select->where('catagory_id = ?', $id);//you may need to build a join for this to work how you want it to, depends on your table structure.
$adapter = new Zend_Paginator_Adapter_DbTableSelect($select);//the paginator adapter in place of the fetchAll().
return $adapter;
{
}
now your models will return paginator adapters with the contents of these tables available. Zend_Paginator will automatically supply the $limit and $offset parameters to the query so that each page will perform a query. The whole table will not be stored in memory with this adapter.
Now your indexAction() may look like:
public function indexAction()
{
Zend_View_Helper_PaginationControl::setDefaultViewPartial('/pagination.phtml');
$pages = new Application_Model_DbTable_Catalog();
$adapter = $pages->getPagedCatalog(); //get adapter from model
$page = $this->_getParam('page', 1);//a default of page 1 prevents possible unusual behavior when no page number is set.
$paginator = new Zend_Paginator($adapter);
$paginator->setItemCountPerPage('10');
$paginator->setCurrentPageNumber($page);
//$paginator->setView($this->view); This line is likely not needed
$this->view->paginator = $paginator;
}
and your categoryAction() might work like:
public function categoryAction()
{
$page = $this->_getParam('page', 1);
$id = intval($this->_getParam('id', 0));
if ($id > 0) {
$category = new Application_Model_DbTable_Categories();
$adapter = $category->getPagedCatagories($id);
//same as above
$paginator = new Zend_Paginator($adapter);
$paginator->setItemCountPerPage('10');
$paginator->setCurrentPageNumber($page);
//$paginator->setView($this->view); This line is likely not needed, unless you have multiple view objects.
$this->view->paginator = $paginator;
} else {
//do some other stuff...
}
}
if you get crazy and want to use your own mapper classes to base a paginator adapter on you can extend the adapter class by overriding getItems(), something like:
<?php
class Music_Model_Paginator_Track extends Zend_Paginator_Adapter_DbTableSelect
{
//override getItems()
public function getItems($offset, $itemCountPerPage)
{
$rows = parent::getItems($offset, $itemCountPerPage);
$albums = array();
foreach ($rows as $row) {
$album = new Music_Model_Mapper_Track();//use this class to turn each $row into an object
$albums[] = $album->createEntity($row); //build the new entity objects
}
//returns an array of entity objects to the paginator
return $albums;
}
}
Hope this helps.