custom sort order?

is there a way I can sort a ditto list by custom TV vs. document placeholders?

I have a [*product_price*] tv that I want to be able to sort by.

I do in fact believe so. Please see http://ditto.modxcms.com for lots of interesting examples and always run the latest version.

are you thinking of this?
http://ditto.modxcms.com/files/snippet-ditto-php.html#orderBy

orderBy

An array that holds all criteria to sort the result set by. Note that using a custom sort will disable all other sorting.

$orderBy["parsed"][] = array("sortBy","sortDir");
$orderBy["custom"][] = array("sortBy","callback_function");

that’s the closets I could find, but I don’t get how do I actually use this piece of code.

&orderBy=`product_price DESC` ... something like this.

cool, I just need to add the tv prefix to the sortBy param and the sorting is done.

does anyone knows how can I allow user to change the ditto call sort option themselves?
I want to have something like


I’m think on some js that shows a different ditto call when the links are clicked but thinking maybe there is an easy way to do that without inventing the wheel?

JS will not work since it is post rendering. you could use a wrapper snippet to get the sort parameter but you could also use dittos ’request’ extender function for this.

does anyone knows how can I allow user to change the ditto call sort option themselves?

Generally speaking, there are various approaches:

- each option is a link to another page, which has another ditto-call in it. (easy, but not very efficient if you have such stuff in many site-areas)
- build a page-structure with Ajax-tabs. Each tab loads another page and displays just the tab-content-area (no entire page-reloads).
- write a little snippet that waits for a certain $_GET parameter (PHP switch statement). Depending on that value, create the Ditto call dynamically. You could use the API function $modx->runSnippet() for that.

thanks for the replies guys, appreciate it a lot.
I don’t like the idea of having to repeat the same info several times and show the correct page when a link is clicked and thinking I understood Ditto request extender I tried something like this but it didn’t work.


So I made a sortByOptions TV with these:name==pagetitle||Brand==tvproduct-brand||Price==tvproduct-price
and tried to added the TV to front end using the Quill snippet which allows the user to select the option from the drop down.



but the call won’t refresh or update when a new selection is made.
So I guess I don’t quite get how to use of the request extender.

any help is appreciated.

I guess my question is if the request extender is ’out of the box’ solution or do I still need a snippet to use it (sort of like Results Per Page snippet)?