Question

每次我从寻呼机请求页面时，是否可以在不调用查询的情况下使用zend分页？

当我从寻呼机点击页码时，下面的zzAction请求已完成，并再次获取查询。我的查询很大，我不想再次获取查询。我在代码中遗漏了什么。

代码：

控制器：

public function getOnePageOfEntries($array, $page=1) {
    $paginator = Zend_Paginator::factory($array); 
    $paginator->setItemCountPerPage(6);
    $paginator->setCurrentPageNumber($page);
    return $paginator;
}
public function zzAction() {
   ...

    $tt= $this->yyObject->xx(....);

    $paginator = $this -> getOnePageOfEntries($tt, $page);
    $this->view->paginator = $paginator;

}

型号：

public function xx(...){

    try{
        ...

        $stmt = $this->prepare("CALL sp_yy(...)");
        ....

                    $stmt->execute();

        $result = $stmt->fetchAll();


        if (is_null($result)) {
            return null;
        }

        return $result;

    }catch (ErrorsException $obj){
                echo $obj;exit;
    }//end try
}

查看：

<?php
$config = Zend_Registry::get('appsConfig');
?>
<?php if (count($this->paginator)){ ?>

<?php foreach($this->paginator as $cc){ ?>
<?php echo $cc['id'] . '/';?>
<?php } ?>
<?php } ?>
<?php echo $this->paginationControl($this->paginator,
'Sliding','ff/my_pagination_control.phtml'); ?>

Answer 1

使用Zend_Paginator_Adapater_DbSelect（）;

示例：

    $adapter     = new Zend_Paginator_Adapter_DbSelect($data); //$data is database query
    $pagination  = new Zend_Paginator($adapter);

在此处查看更多信息：

Zend_Paginator_Adapter_DbSelect

Answer 2

您当前的代码会人为限制数组适配器的实用程序，并强制您为每个页面执行整个查询。您需要在使用此分页器的控制器操作中完成的操作是仅在数据尚不存在时才执行查询。也许类似于：

//consider this to psuedocode as it has not been tested a represents an idea
public function zzAction()
{ 
    //get page number
    $page = $this->getRequest()->getParam('page');
    //set session namespace, probably better to do this in init() method or bootstrap
    $session = new Zend_Session_Namespace('paged')
    //test for presence of persisted array
    if (!isset($session->paginator)) {
        //perform query
        $arrayToPage = $this->yyObject->xx(....);
        //persist result array
        $session->paginator = $arrayToPage;
    } else {
        //retrieve persisted array
        $arrayToPage = $session->paginator;
    }

    $paginator = $this -> getOnePageOfEntries($arrayToPage, $page);
    $this->view->paginator = $paginator;

}

使用DbTableSelect或DbSelect paginator适配器通常效率更高，因为它只查询需要填充特定页面的数据。当您的用户想要从第1页到第7页...

时，这非常有用

使用分页器时的另一个考虑因素是自定义实体模型。这在ZF中相当容易处理：

<?php
class Record_Model_Paginator_Record extends Zend_Paginator_Adapter_DbTableSelect
{
    //override getItems to customize the adapter to use a specific mapper to create entities
    public function getItems($offset, $itemCountPerPage)
    {
        $rows = parent::getItems($offset, $itemCountPerPage);

        $record = array();
        foreach ($rows as $row) {
            //initiate mapper
            $recordEntity = new Application_Model_Mapper_Record();
            //create entity models
            $record[] = $recordEntity->createEntity($row);
        }
        //returns an array of objects, similar to a Zend_Db_Rowset object
        return $record;
    }
}

我希望这会有所帮助。

zend Pagination没有为每个页面再次获取查询

2 个答案: