zend_cache question

backdoc · #1 (**permalink**) 03-19-2008, 02:27 AM

I am new to Zend and am attempting to cache a large db query. If it's not cached, it works (in the sense that I can iterate through my Table_Rowset in my view). But, if it's cached, I always get the following (snipped):

__PHP_Incomplete_Class Object ( [__PHP_Incomplete_Class_Name] => Zend_Db_Table_Rowset..... "followed by all of the data I expect"

I'm creating my cache object in the preDispatch() function with the following code:

PHP Code:


			
require_once 'Zend/Cache.php';

        $frontendOptions = array(

            'lifetime' => 7200,

            'automatic_serialization' => true

        );

        $cache_path = Zend_Registry::get('cache_path');

        $backendOptions = array(

            'cache_dir' => $cache_path->temp_dir

        );

        $this->cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);

Then, I try to use it in my IndexAction(), like this:

PHP Code:


			
    function IndexAction() {

        $this->view->title = "View Agent";

        $order = $this->_request->get("order");

        if(!$cached_agents = $this->cache->load('agents_list_cached')) {

            $agents = new Agent();

            if(isset($order) && $order == "lname" || $order == "fname" || $order == "email" || $order == "city" || $order == "state" || $order == "phone" )

                $cached_agents = $agents->fetchAll($agents->select()->where('status = ?', 'A')->order($order));

            else

                $cached_agents = $agents->fetchAll($agents->select()->where('status = ?', 'A')->order('lname'));

            $this->cache->save($cached_agents, 'agents_list_cached');

            $this->view->agents = $this->cache->load('agents_list_cached');

        } else {

print_r($cached_agents);

//print_r($this->cache->load('agents_list_cached'));

die();

            $this->view->agents = $this->cache->load('agents_list_cached');

            //die($cached_agents);

        }

    }

But as mentioned above, this is not returning the correct type of object???

Suggestions???

Thanks,
Darren

backdoc · #2 (**permalink**) 03-20-2008, 11:50 AM

I was finally able to resolve this by adding two loadClass statements above my cache loads. For example,

PHP Code:


			
    function IndexAction() {

        $this->view->title = "View Agent";

        $order = $this->_request->get("order");

// these two classes are required because I'm caching.  If I don't use

// caching, they somehow get magically loaded....

Zend_Loader::loadClass('Zend_Db_Table_Rowset');

Zend_Loader::loadClass('Zend_Db_Table_Row');

        $this->view->cached_agents = $this->cache->load('agents_list_cached');

        if(!$this->view->cached_agents) {

            $agents = new Agent();

            if(isset($order) && $order == "lname" || $order == "fname" || $order == "email" || $order == "city" || $order == "state" || $order == "phone" )

                $this->view->cached_agents = $agents->fetchAll($agents->select()->where('status = ?', 'A')->order($order));

            else

                $this->view->cached_agents = $agents->fetchAll($agents->select()->where('status = ?', 'A')->order('lname'));

            $this->cache->save($this->view->cached_agents, 'agents_list_cached');

        }

    }

This problem seems to relatively uncommon. I was only able to find two threads on google where this problem was addressed. I didn't really understand the solution to either thread. But, the thread at this link gave me enough to figure it out.

Nabble - Zend Framework - Zend_Cache, storing objects

I don't understand why the example in the Zend Framework documentation is not more clear on this.

Zend Framework: Documentation

BTW, I know that my logic is flawed. So, if you are here looking for an a solution to your own problem, don't let that throw you off. If I sort my table by any order other than id, the cached version doesn't match what I want. But, that wasn't my short term goal. I just wanted to get my cache working. That part is working. I'll work on the remaining logic next.

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