Incorrect file source for images in MIGX-grid inside another MIGX-grid

[Ruslan-Aleev]

1. I create a TV for the image (standard TV image in MODX), set the file source for the TV, and specify the TV in the MIGX Form Tabs via the inputTV for the MIGX-TV grid.

2. Then I set this MIGX-TV through inputTV in another MIGX-TV grid.

3. So, image previews ("renderer": "this.renderImage") when adding/editing an element are not displayed correctly.
   This happens because the file source is set to standard (from the system settings), and not the TV source (this can be seen by viewing the element code).

Probably some of the functions are not working correctly.

https://github.com/Bruno17/MIGX/blob/master/core/components/migx/model/migx/migx.class.php#L1695

https://github.com/Bruno17/MIGX/blob/master/core/components/migx/model/migx/migx.class.php#L1707

[Bruno17]

did you try to debug, what happens in getFieldSource?

[Ruslan-Aleev]

I tried debug, but I didn't quite understand the logic. getFieldSource returns $mediasource = $this->getDefaultSource() it seems.
Maybe the problem in prepareSourceForGrid($inputTv) in the line $tv = $this->modx->newObject('modTemplateVar') I tried watching ID TV and sources and the last TV didn't have ID.

[halftrainedharry]

Is there a reason why you use an image TV "slider_src" and not just "inputTVtype":"image"?

---

Maybe try using the setting "sourceFrom".
It kind of seems to work if I use "sourceFrom": "migx" in "about_slider_items" and "sourceFrom": "tv" in "about_slider" and set the correct media-source in the TV "about_slider_items".

about_slider_items

[{
	"caption": "Слайдер",
	"fields": [{
		"field": "image",
		"caption": "Изображение",
		"inputTV": "slider_src",
		"sourceFrom": "migx"
	}]
}]

about_slider

{
	"field": "items",
	"caption": "Изображения",
	"inputTV": "about_slider_items",
	"sourceFrom": "tv"
}

---

Also, have you tried using MIGX configurations (menu "Extras" ("Пакеты") -> "MIGX" ->tab "MIGX") instead of putting all the settings directly into TVs?

[Ruslan-Aleev]

Is there a reason why you use an image TV "slider_src" and not just "inputTVtype":"image"?

I'm using inputTV to set the media source. There is probably another option, but this one is more familiar to me, and it works reliably.

Maybe try using the setting "sourceFrom".

Yes, this works, thanks.
I solved this using renderChunk, where I set the id media source:

[{
"dataIndex": "image",
"header": "Изображение",
"sortable": "false",
"renderer": "this.renderChunk",
"renderchunktpl": "<img src='/promtConnectors/system/phpthumb.php?h=80&f=png&src=[[+image]]&source=4'>",
"width": "900"
}]

Also, have you tried using MIGX configurations (menu "Extras" ("Пакеты") -> "MIGX" ->tab "MIGX") instead of putting all the settings directly into TVs?

For this task it is unnecessary, as it seems to me, MIGX configuration takes a lot of time.

I understand that the problem can be solved in different ways, BUT the fact that the current option works a little incorrectly is 100%.

[joelnz]

Just wanted to share my workaround for this same issue in case it helps others. I was also nesting a MIGX inside another MIGX, and using an image TV with a custom Media Source. Everything worked, except the thumbnails would break in the grid view (attempting to load them from the default media source).

My setup:
inputTVtype: image
sourceFrom: "migx" in the child MIGX
sourceFrom: "tv" in the parent MIGX
Custom media source assigned to the image TV

The issue:
When using "renderer": "this.renderChunk" to fix the grid thumbnail, it also overrides the real data field, causing the HTML to be saved in place of the filename — breaking everything.

My solution: Instead of modifying the original image field in the MIGX column config, I created a separate “FAKE” column just for display:

{ "header": "FakeThumb", "dataIndex": "fake_thumb_preview", "renderer": "this.renderChunk", "renderchunktpl": "<img src='/connectors/system/phpthumb.php?src=[[+image]]&w=80&h=80&zc=1&far=1&source=2'>", "show_in_grid": 1 }

• The original image field remains untouched in the formtabs (where the real filename is stored).
• The grid now displays the correct thumbnail.
• Saving and re-editing works as expected.
• Nothing breaks anymore 🎉

The key is: don’t reuse dataIndex: "image" in your renderChunk column — it silently mutates your actual field data.