Smarty

[tome]

I tried using $smarty->isCached to see whether a template is cached and so only execute database code if it returns false. The problems is according to the manual technical Note:

http://www.smarty.net/docs/en/api.is.cached.tpl

is that it stores its own cache internally, this means it can only be used once which basically makes it a useless function!!!

Please is there anyway around this or an alternative function that works each time the cach has expired.

Many thanks

[mohrt]

?? The internally cached file is only for the current script execution to avoid race conditions. Is it not behaving as you expect?

[rodneyrehm]

[tome]

Hi guys, thanks for replies. The reason I'm finding it 'useless' is because I have a simple script like this:

require_once('Smarty.class.php');
$smarty = new Smarty;

$smarty->setCaching(Smarty::CACHING_LIFETIME_SAVED);

if(!$smarty->isCached('mytemplate.tpl')) { // not cached
$smarty->assign("myvar",'assigned!!',true); //myvar would come from lots of database calls which I do not want repeated until the cach expires when I want them called again

} else { // cached


}


$smarty->setCacheLifetime(300); // cache expires regularly
$smarty->display('mytemplate.tpl');


'mytemplate.tpl' is a simple template with {$myvar} only

But since isCached only works once, when the cache expires my database calls don't get run again!

Many thanks

[rodneyrehm]

please run the $smarty->setCacheLifetime(300); before isCached().

[U.Tews]

isCache() will return false every time the cache has expired.

As rodney said if you use isCache() for same template within one script run it will return same result for all calls.

[tome]

please run the $smarty->setCacheLifetime(300); before isCached().

I tried this and it appears to be working now. Its not clear from the docs that you have to setCacheLifetime before isCached.

Many thanks for your help

[mohrt]

[tome]

Having problems with this script:

<?php
ini_set('display_errors',1);
require_once('libs/Smarty.class.php');
$smarty = new Smarty;


$smarty->setCaching(Smarty::CACHING_LIFETIME_SAVED);

$smarty->setCacheLifetime(3);
if(!$smarty->isCached('mytemplate.tpl')) {
echo 'not cached';
// lots of database calls would go here! and would be assigned to $mydate
$mydate = gmdate("Y-m-d H:i:s");
$smarty->assign("myvar",$mydate,true);
} else {
echo 'cached';
$mydate = 'xxx';
$smarty->assign("myvar",$mydate,true);
}



$smarty->display('mytemplate.tpl');

?>

contents of mytemplate.tpl:

<div>
{$myvar}
</div>

I want the template to cache but if I assign myvar in the else clause the template doesn't cache and If I don't assign I get a php notice. The point of the isCached is so that database calls are only called when the cache expires.

Need help ,

Many thanks

[U.Tews]