You can use an alternative concrete class for instances of Rowsets
by extending Zend_Db_Table_Rowset_Abstract. Specify the custom
Rowset class by name either in the $_rowsetClass
protected member of a Table class, or in the array argument of the
constructor of a Table object.
Example 322. Specifying a custom Rowset class
<?php
class MyRowset extends Zend_Db_Table_Rowset_Abstract
{
// ...customizations
}
// Specify a custom Rowset to be used by default
// in all instances of a Table class.
class Products extends Zend_Db_Table_Abstract
{
protected $_name = 'products';
protected $_rowsetClass = 'MyRowset';
}
// Or specify a custom Rowset to be used in one
// instance of a Table class.
$bugs = new Bugs(array('rowsetClass' => 'MyRowset'));
Typically, the standard Zend_Db_Rowset concrete class is
sufficient for most usage. However, you might find it useful
to add new logic to a Rowset, specific to a given Table.
For example, a new method could calculate an aggregate
over all the Rows in the Rowset.
Example 323. Example of Rowset class with a new method
<?php
class MyBugsRowset extends Zend_Db_Table_Rowset_Abstract
{
/**
* Find the Row in the current Rowset with the
* greatest value in its 'updated_at' column.
*/
public function getLatestUpdatedRow()
{
$max_updated_at = 0;
$latestRow = null;
foreach ($this as $row) {
if ($row->updated_at > $max_updated_at) {
$latestRow = $row;
}
}
return $latestRow;
}
}
class Bugs extends Zend_Db_Table_Abstract
{
protected $_name = 'bugs';
protected $_rowsetClass = 'MyBugsRowset';
}