Answered Followed 'Developing an Extra' tutorial, update form grid not working

Hello,

I've succesfully followed the "Developing and Extra" tutorial, up to the end of part II (http://rtfm.modx.com/revolution/2.x/case-studies-and-tutorials/developing-an-extra-in-modx-revolution/developing-an-extra-in-modx-revolution,-part-ii). Well, almost succesfully.

I'm stuck in the last passage, the "update from grid". It looks like the upgradeFromGrid.class.php example from the tutorial is completely off: the ajax call receives a simple 'DoodleUpdateFromGridProcessor' plain text response, instead of, I would imagine, a JSON object.

Other sources offer very different upgradeFromGrid.class.php examples, eg.:

https://forums.modx.com/thread/87174/make-grid-field-editable#dis-post-480254
https://github.com/bertoost/MODX-Polls/blob/master/core/components/polls/processors/mgr/questions/updatefromgrid.php

Who is right, who is wrong? Is there any updated and tested documentation for working with updates from grid? I searched but I couldn't find any.

Thank you for the clarification,
Manuele Sarfatti

You might find this helpful: http://bobsguides.com/blog.html/2013/11/21/modx-cmps-an-anatomy-lesson/.

If you're not getting a JSON string back from the Ajax request (you can see the response in Chrome Dev. tools), there's a missing step somewhere where $modx->toJSON() should be being called for the array.

MODX looks for a class file first, and uses the old-style version you had originally if it can't find one. I think yours might have worked if you had called $modx->toJSON() on the return value. I think the parent class does it for you if you use a class-based processor, which is the preferred method now.