Safely appending GET parameters in Revo... an Output filter?

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Everett Reply #1, 16 years, 2 months ago

Say I’ve got a custom table of categories, and I want to provide a link to a page that passes the category ID so that the links are something like this:

<li><a href="/path/to/mypage?category_id=123">My Category</a></li>
<li><a href="/path/to/mypage?category_id=411">My Other Category</a></li>

I can do this pretty easily using the ~ syntax, e.g. my template chunk might look like this:

<li><a href="[[~2]]?category_id=[[+category_id]]">[[+name]]</a></li>

BUT... this solution isn’t fail-safe. If Friendly URLs are disabled, it will fail... you’d get something like index.php?q=/path/to/my/page?category_id=123 -- 2 "?"’s would be a trainwreck, no?

So is there a cool MODx way to safely append arguments to a URL that will handle the case that FURLs are disabled? Something like this maybe:

<li><a href="[[~2:category_id=`123`]]">My Category</a></li>

Know what I mean?

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breezer Reply #2, 16 years, 2 months ago

Having that as an output filter would be cool, but heres how I usually solve that issue.

Create a snippet with the following code and add it to the header of the template:

<?php
// revolution  [[+link_sep]]
$link_sep = $modx->getOption('friendly_urls') =='1' ? '?' : '&';

// evolution   [+link_sep+]
//$link_sep = $modx->config['friendly_urls'] =='1' ? '?' : '&';

$modx->setPlaceholder('link_sep', $link_sep);
?>

Then use [[+link_sep]] (revo) or [+link_sep+] (evo) as needed.

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http://frsbuilders.net (under construction) forum for evolution

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Everett Reply #3, 16 years, 2 months ago

Yeah... a Snippet would do the trick. It looks like SOMETHING is happening when you add some output filters, e.g.:

[[~1:ucase]]

Outputs:

/?FILTER_COMMANDS=ARRAY&FILTER_MODIFIERS=ARRAY

But this isn’t doing much for the backend... I set up a "Testing" Snippet with the following code:

print_r( get_defined_vars() ); 
exit;

Compare [[~1:Testing]]

Array
(
    [scriptProperties] => Array
        (
            [input] => /?filter_commands=Array&filter_modifiers=Array
            [options] => 
            [token] => 
            [name] => 1
            [tag] => [[~1:Testing]]
        )
)

To a "legitimate" Output Filter [[*alias:Testing]]:

Array
(
    [scriptProperties] => Array
        (
            [input] => test
            [options] => 
            [token] => *
            [name] => alias
            [tag] => [[*alias:Testing]]
        )
)

How do you access filter_commands in the Snippet? I can read the $input, $options, $name, etc... so I can write a custom Output filter that will handle this... but the behavior here is weird.

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splittingred Reply #4, 16 years, 2 months ago

[[~2? &category_id=`123` &anotherParam=`value`]]

shaun mccormick | bigcommerce mgr of software engineering, former modx co-architect | github | splittingred.com

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Everett Reply #5, 16 years, 2 months ago

Thanks Shaun! I should have known there was a simpler way.

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