FieldsPlugin subform

[Gulvar]

Hi everybody.

I try to create a FieldsPlugin with a repeatable subform. The display works great but the storage in database does not work.

Here's my plugin structure :

plugins/fields/slides/slides.xml
plugins/fields/slides/subform.xml (contains the subform to repeat)
plugins/fields/slides/tmpl/slides.php (just a hello world for the moment)
plugins/fields/slides/params/slides.xml (standard field plugin params)

The plugin is installed and works, I can choose the type "slides" when I create a custom field.
My repeatable subform shows well on the content form page.
When I save my form there are same amount of lines added in #__fields_values as the amount of lines of repeatable subform I created the field_id and item_id are correct but the value column is empty.

I suppose that the framework doesn't test the type of "value" before sending it the database. So it send the Array() (PHP) and that cause a blank value in the database.

Anybody here already tries to make something similar ? Any advice ?
Thanks for help.

My code :

plugins/fields/slides/slides.php
------------------------------------------------------
<?php
defined('_JEXEC') or die;

JLoader::import('components.com_fields.libraries.fieldsplugin', JPATH_ADMINISTRATOR);


class PlgFieldsSlides extends FieldsPlugin
{
public function onCustomFieldsPrepareDom($field, DOMElement $parent, JForm $form) {

$fieldNode = parent::onCustomFieldsPrepareDom($field, $parent, $form);

if (!$fieldNode) {
return $fieldNode;
}

$fieldNode->setAttribute('type', 'subform');
$fieldNode->setAttribute('formsource', "plugins/fields/slides/subform.xml");
$fieldNode->setAttribute('multiple', 'true');
$fieldNode->setAttribute('layout', 'joomla.form.field.subform.repeatable-table');


return $fieldNode;
}
}
----------------------------------------------------------


plugins/fields/slides/subform.xml
----------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<form>
<fieldset name="section1" label="Section1">
<field name="title" type="text" label="Title" required="true"/>
<field name="slide" type="media" label="Image" required="true"/>
</fieldset>
</form>
----------------------------------------------------------

PS : To test I made a verification in the onContentAfterSave function on the file plugins/system/fields/fields.php
Something to detect if the value type is an array (or object) and serialize it.
It works, the value in database are correctly set.

But I can't change the official plugin.

Does anybody knows a way to manipulate the value in a fields plugin before it is saved by the system plugin ?

[Allon Moritz]

Do you have a Github repo where we can see the code, perhaps I can give you a hint.

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[Gulvar]

Thanks for your reply.
Here it is : https://bitbucket.org/sebastien_horemans/plg_slides/src

Thanks for your help.

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[pepperstreet]

Does anybody knows a way to manipulate the value in a fields plugin before it is saved by the system plugin ?

Hello, maybe this related product and author can be of any help for you? 

https://www.richeyweb.com/software/joomla/plugins/147-fields-subform