OnDocFormSave and a simple internal function - what's going wrong here ...

6 Posts

spechto Reply #1, 7 years, 2 months ago

Hello together,

at the moment I don't understand modx, because the following minimal code example
did not work. On pressing the Save-Button in a Resource the system hangs:

<?php
$PlugName = "TestPlugIn";

// ****** Internal Functions ******

function MyInternalFn($id) {
  $test=$id;
}


// ****** Handle MODX Events ******

switch ($modx->event->name) {
    // ****** OnDocFormRender with $mode $resource $id *********************************************************************************************
    case 'OnDocFormRender':
        $modx->log(MODX_LOG_LEVEL_INFO, "[$PlugName -> ".$modx->event->name."] ID: ($id)   Mode:($mode)");
       break;
    // ****** OnBeforeDocFormSave with $mode $resource $id  ****************************************************************************************
    case 'OnBeforeDocFormSave':
        $modx->log(MODX_LOG_LEVEL_INFO, "[$PlugName -> ".$modx->event->name."] ID: ($id)   Mode:($mode)");
        break;
    // ****** OnDocFormSave with $mode $resource $id ***********************************************************************************************
    case 'OnDocFormSave':
        $modx->log(MODX_LOG_LEVEL_INFO, "[$PlugName -> ".$modx->event->name."] ID: ($id)   Mode:($mode)");
        break;
    // ****** OnBeforeEmptyTrash with $ids *********************************************************************************************************
    case 'OnBeforeEmptyTrash':
        $modx->log(MODX_LOG_LEVEL_INFO, "[$PlugName -> ".$modx->event->name."] Anzahl zu löschender IDs: (".count($ids).")");
        break;
    default: break;
}

There are to ways, the system doesn't hang anymore:
1) Remove the function MyInternalFn or
2) Remove the system event 'OnDocFormSave' for this PlugIn
Both variants I don't understand, because the code
should work ...

Thanks
Martin

This question has been answered by spechto. See the first response.

24,544 Posts

BobRay Reply #2, 7 years, 2 months ago

A couple of thoughts:

1. Wrap all the variables in curly braces: {$plugName} {$id} (also, using -> in the string may confuse the parser).

2. Make sure you're not calling your function in events that don't send $id in the invokeEvent() call, and don't display variables that are not sent.

See this: https://bobsguides.com/modx-revolution-events.html

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6 Posts

spechto Reply #3, 7 years, 2 months ago

I'll try so, but the version above pasted in a new "PlugIn", activate
the 4 events and the problem is there (Revo 2.6.5, PHP 7.0 and 7.2).
The hanger can be removed by "removing the unused function" or
"remove the event handler for the OnDocFormSave".

This is a more reduced version, but the problem is still there ...

<?php
$PlugName = "TestPlugIn";

function MyInternalFn() {
  $test=0;
}

switch ($modx->event->name) {
    case 'OnDocFormRender':
       break;
    case 'OnBeforeDocFormSave':
        break;
    case 'OnDocFormSave':
        break;
    case 'OnBeforeEmptyTrash':
        break;
    default: break;
}

I can't explain, why this happens ...

6 Posts

spechto Reply #4, 7 years, 2 months ago

So, I tested a little bit and I think that the problem is how modx
calls the PlugIn code in conjunction with "OnDocFormSave" and "OnBeforeDocFormSave".
At first I splitted the Code in two PlugIns and set the correct event for the plugin:

function MyInternalFn() { $test=0; }
if ($modx->event->name == 'OnBeforeDocFormSave') { $test=1; }

function MyInternalFn() { $test=0; }
if ($modx->event->name == 'OnDocFormSave') { $test=1; }

This code will cause a system hanger. When changing the both functions names in two
different names, it works. I think the problem is the redeclaration of the function MyInternalFn().

discuss.answer

6 Posts

spechto Reply #5, 7 years, 2 months ago

Here is the (or a) solution. So the function can't redeclared
and the system works WITHOUT a hanger

Without 'OnDocFormSave' it has worked with functions because
the Plugin code was run only once, but with 'OnDocFormSave'
and 'OnBeforeDocFormSave' the code is called twice in the same
call ...

// ****** Internal Functions ******

if (!function_exists('MyInternalFn')) {
  function MyInternalFn($id) {
    $test=$id;
  }
}

24,544 Posts

BobRay Reply #6, 7 years, 2 months ago

Duh. I should have thought of that.

Did I help you? Buy me a beer
Get my Book: MODX:The Official Guide
MODX info for everyone: http://bobsguides.com/modx.html
My MODX Extras
Bob's Guides is now hosted at A2 MODX Hosting

Answered OnDocFormSave and a simple internal function - what's going wrong here ...