Deprecation: #107047 - ExtensionManagementUtility::addPiFlexFormValue() 

See forge#107047

Description 

The method \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue() has been deprecated.

This method was historically used to assign FlexForm definitions to plugins registered as subtypes in the list_type field of tt_content. With the removal of subtypes (see Breaking: #105377 - Deprecated functionality removed) and the shift toward registering plugins as dedicated record types via CType, as well as the removal of the ds_pointerField and multi-entry ds array format (see Breaking: #107047 - Remove pointer field functionality of TCA flex), this separate method call is no longer necessary.

Impact 

Calling this method will trigger a deprecation warning. The extension scanner will also report any usages. The method will be removed in TYPO3 v15.0.

Affected installations 

Extensions that call \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue() to assign FlexForm definitions to plugins or content elements are affected.

Migration 

Instead of using this method, define the FlexForm configuration using one of the following approaches:

Option 1: Register via registerPlugin() 

Provide the FlexForm definition directly when registering the plugin. This has been possible since Feature: #107047 - FlexForm enhancements: Direct plugin registration and raw TCA support.

EXT:my_extension/ext_localconf.php 
use TYPO3\CMS\Extbase\Utility\ExtensionUtility;

ExtensionUtility::registerPlugin(
    'MyExtension',
    'MyPlugin',
    'My Plugin Title',
    'my-extension-icon',
    'plugins',
    'Plugin description',
    'FILE:EXT:my_extension/Configuration/FlexForm.xml'
);
Copied!

Option 2: Register via addPlugin() for non-Extbase plugins 

This is also supported since Feature: #107047 - FlexForm enhancements: Direct plugin registration and raw TCA support.

EXT:my_extension/ext_localconf.php 
use TYPO3\CMS\Core\Imaging\Icon;
use TYPO3\CMS\Core\Imaging\IconRegistry;
use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\SelectItemUtility\SelectItem;

ExtensionManagementUtility::addPlugin(
    new SelectItem(
        'select',
        'My Plugin Title',
        'myextension_myplugin',
        'my-extension-icon',
        'plugins',
        'Plugin description'
    ),
    'FILE:EXT:my_extension/Configuration/FlexForm.xml'
);
Copied!

Option 3: Define FlexForm via TCA columnsOverrides 

You can also directly define the FlexForm in TCA:

EXT:my_extension/Configuration/TCA/Overrides/tt_content.php 
$GLOBALS['TCA']['tt_content']['types']['my_plugin']['columnsOverrides']
    ['pi_flexform']['config']['ds'] =
    'FILE:EXT:my_extension/Configuration/FlexForm.xml';
Copied!