How to sort with getResources

I want to sort the resources found by Getresources according to a template variable, eventDate. My chunk says:
[[!getResources?
&parents=`7`
&depth=`0`
&sortby=`eventDate`
&includeTVs=`1`
&tpl=`eventChunk`
]]

It gives no output at all, but when I change `eventDate` to `pagetitle` it works fine. I’ve tried superstitiously with +eventDates and *eventDates and tv.eventDates but none of them produce any output.

What am I doing wrong, please?

You must use the sortbyTV and sortdirTV properties to sort by a template variable.

Thanks OpenGeek, works fine.

It would be great to have this mentioned on the getResources page, how do I try to make that happen?

In fact, I would like to know how you found out, OpenGeek. Where is sortbyTV mentioned? I just searched the dashboard which claims to be the official MODx documentation and the search gave no results.

Jason (Opengeek) wrote it, so he’s fairly familiar with the code.

Looks like the getResources docs got a little out of sync with the progress. I have added the TV related properties to the documentation.

@rthrash: Yes, I guess writing the code helps you to know what it does.

@smashingred: Many thanks on behalf of your future info-seekers. I’m impressed by the speed and responsiveness. I just read what you wrote and I think it will be clear to people like me.