Cacheing of variables in foreach fails

[0xFEEDC0DE64]

I need to cache a big list in a foreach. But I dont want to cache which one will be highlighted.
The {foreach} itself gets cached, but not variable in the {if}!

See this very small test case:

testcase.php:

<?php

require_once('smarty/Smarty.class.php');

$smarty = new Smarty;

$smarty->setCaching(true);

if(!$smarty->isCached('testcase.tpl')) {
    $smarty->assign('list', [
        ['id' => 1, 'name' => 'test 1'],
        ['id' => 2, 'name' => 'test 2'],
        ['id' => 3, 'name' => 'test 3']
    ]);
}

$smarty->assign('current', 2, true);

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

testcase.tpl

<ul>
{foreach from=$list item=item}
    <li>{$item.name} {if $current==$item.id} ACTIVE{/if}</li>
{/foreach}
</ul>

It is not possible because the if accesses the variable $item even if cache is enabled!
if ($_smarty_tpl->tpl_vars[\'current\']->value == $_smarty_tpl->tpl_vars[\'item\']->value[\'id\'])

it should look like this (note that this is handmade, not compilermade):

if ($_smarty_tpl->tpl_vars[\'current\']->value == 12)

testcase.php
testcase.tpl
7af6b444214920055f0e476b62736e9e88058c99_0.file.testcase.tpl.cache.php
7af6b444214920055f0e476b62736e9e88058c99.testcase.tpl.php

[uwetews]

It's a know restriction that you can't combine normal variables and nocache variables in one tag.
We have this on our todo list, but first experiments showed that it is a very complex task.

Sorry I can't help at the moment.

[0xFEEDC0DE64]

Isn't it possible that you check every expression while generating the compiled template if it is a cached expression?

[uwetews]

The problem is that the value of $item.id is not know at compile time. An even worse the value of $item.id does change on each iteration of the foreach loop. The foreach loop is processed while rendering the compiled template. and the variable $item.id does exist only at that time. The cached template does not know any thing about all of this.

[uwetews]

There is now a solution for your problem with the new tag {make_nocache}.
Read NEW_FEATURES.txt

<ul>
{foreach from=$list item=item}
    <li>{$item.name} {make_nocache $item}}{if $current==$item.id} ACTIVE{/if}</li>
{/foreach}
</ul>

This is now available in the master branch and will later be included in 3.1.30