Track Changes to a User Field - Even through Grid Edit

You could use a Webhook.  But the issue there will be that they gate Webhooks to a maximum of 10 per second.  So I think that if you have a large Grid edit more than 10 changes, it would miss some.  But it would still be better than what it is now with grid edit which is logging nothing form Grid edit.

Yes it is possible using the IOL technique in grid edit mode. You have to monkey patch the function GeditSubmit(). The jax.params will contain a string of XML in this format which represents the changes made:

<qdbapi>
    <geRidListStr2000>1~~!~^3~~!~^4~~!~^5~~!~^6~~!~^2~~!~^-10~~!~^-11~~!~^-12~~!~^-13</geRidListStr2000>
    <geDFID2000>0</geDFID2000>
    <geDBID2000>bk8f9xcs8</geDBID2000>
    <geOldRidListID2000>3775</geOldRidListID2000>
    <geDoneURLID2000>112</geDoneURLID2000>
  <gridData2000>t~~!~^4~~!~^6~~!~^e~~!~^2\nt~~!~^5~~!~^6~~!~^x~~!~^3\nt~~!~^2~~!~^7~~!~^s~~!~^4\n</gridData2000>
</qdbapi>

Believe it or not, all the grid edit changes are encoded within this XML which can be parsed with script and changes logged to additional fields via AJAX calls.

Hmm.  I'm happy to know that it's possible, although I'll admit my experience with JS/AJAX is a bit limited.  I have had some success with the IOL technique, though, and have a decent programming background, so I might be able to figure it out.  Do you know if there is any sort of documentation for how the grid edit changes are encoded?

The documentation can be found here:

https://quickbase.intuitcdn.net/res/72799-10/js/gridEdit.js

Use this documentation viewer:

http://jsbeautifier.org/

Then look for the GeditSubmit function and redefine it to suit your needs along with  a lot of console.logs():

function GeditSubmit(dbid) {
  if (!gGED.HasDataChanged() && !gAndDone) {
    QBalert("<div class=redhead>Nothing to save.</div>You haven't made any changes.");
    return
  }
  if (!GE_validate(gGED)) {
    return
  }
  ClearErrors();
  HidePopupDiv();
  QBbusy("Saving . . .");
  var jax = new jaxreq(dbid + "?a=QBI_GridEditSubmit");
  console.log(JSON.stringify(gGED));
  GE_AddGeInfoToJax(gGED, jax);
  jax.DoAsyncCmd(GESubmitCallback)
  console.log(JSON.stringify(jax.params));
}

You can redefine any QuickBase authored function by injecting a modified function of the same name using IOL.

QuickBase makes heavy use of encoded strings that are delimited by multi character separator strings (in this case "~~!~^" is a five character separator string):

1~~!~^3~~!~^4~~!~^5~~!~^6~~!~^2~~!~^-10~~!~^-11~~!~^-12~~!~^-13

If you decode these strings in the XML you can grab the rids, fids and field values of the modified/deleted records/fields and log what you need. It isn't fun but it isn't too difficult.