diff --git a/typo3/sysext/backend/Classes/Controller/FormInlineAjaxController.php b/typo3/sysext/backend/Classes/Controller/FormInlineAjaxController.php
index e65148aba17e44a050fa00c5fb270281d1a71c38..8121b676db4408c8e3be8e92712eb392f01d74f3 100644
--- a/typo3/sysext/backend/Classes/Controller/FormInlineAjaxController.php
+++ b/typo3/sysext/backend/Classes/Controller/FormInlineAjaxController.php
@@ -120,7 +120,7 @@ class FormInlineAjaxController extends AbstractFormEngineAjaxController
$formDataCompilerInput = [
'request' => $request,
'command' => 'new',
- 'tableName' => $childData['processedTca']['columns'][$parentConfig['foreign_selector']]['config']['foreign_table'],
+ 'tableName' => $this->getChildChildTableName($parentConfig['foreign_selector'], $childData),
'vanillaUid' => $inlineFirstPid,
'isInlineChild' => true,
'isInlineAjaxOpeningContext' => true,
@@ -492,13 +492,11 @@ class FormInlineAjaxController extends AbstractFormEngineAjaxController
{
// foreign_selector on intermediate is probably type=select, so data provider of this table resolved that to the uid already
$childChildUid = $child['databaseRow'][$parentConfig['foreign_selector']][0];
- // child-child table name is set in child tca "the selector field" foreign_table
- $childChildTableName = $child['processedTca']['columns'][$parentConfig['foreign_selector']]['config']['foreign_table'];
$formDataCompiler = GeneralUtility::makeInstance(FormDataCompiler::class);
$formDataCompilerInput = [
'request' => $request,
'command' => 'edit',
- 'tableName' => $childChildTableName,
+ 'tableName' => $this->getChildChildTableName($parentConfig['foreign_selector'] ?? '', $child),
'vanillaUid' => (int)$childChildUid,
'isInlineChild' => true,
'isInlineAjaxOpeningContext' => true,
@@ -662,6 +660,22 @@ class FormInlineAjaxController extends AbstractFormEngineAjaxController
return json_decode($context['config'], true);
}
+ /**
+ * The child-child table name is set in the child TCA "the selector field" and is depending on
+ * the TCA type (select or group) either the "foreign_table" or the (first) "allowed" table.
+ */
+ protected function getChildChildTableName(string $foreignSelector, array $childConfiguration): string
+ {
+ $config = $childConfiguration['processedTca']['columns'][$foreignSelector]['config'] ?? [];
+ $type = $config['type'] ?? '';
+
+ return match ($type) {
+ 'select' => $config['foreign_table'] ?? '',
+ 'group' => GeneralUtility::trimExplode(',', $config['allowed'] ?? '', true)[0] ?? '',
+ default => '',
+ };
+ }
+
protected function getBackendUserAuthentication(): BackendUserAuthentication
{
return $GLOBALS['BE_USER'];
diff --git a/typo3/sysext/backend/Classes/Form/FormDataProvider/TcaInline.php b/typo3/sysext/backend/Classes/Form/FormDataProvider/TcaInline.php
index e10e7fa8e90401bfb0efee5ed96336bb91b7cc80..5c73d29712004bcb835eeeadc055ffd386b73acd 100644
--- a/typo3/sysext/backend/Classes/Form/FormDataProvider/TcaInline.php
+++ b/typo3/sysext/backend/Classes/Form/FormDataProvider/TcaInline.php
@@ -389,14 +389,12 @@ class TcaInline extends AbstractDatabaseRecordProvider implements FormDataProvid
{
// foreign_selector on intermediate is probably type=select, so data provider of this table resolved that to the uid already
$childChildUid = $child['databaseRow'][$parentConfig['foreign_selector']][0];
- // child-child table name is set in child tca "the selector field" foreign_table
- $childChildTableName = $child['processedTca']['columns'][$parentConfig['foreign_selector']]['config']['foreign_table'];
$formDataCompiler = GeneralUtility::makeInstance(FormDataCompiler::class);
$formDataCompilerInput = [
'request' => $child['request'],
'command' => 'edit',
- 'tableName' => $childChildTableName,
+ 'tableName' => $this->getChildChildTableName($parentConfig['foreign_selector'] ?? '', $child),
'vanillaUid' => (int)$childChildUid,
'isInlineChild' => true,
'isInlineChildExpanded' => $child['isInlineChildExpanded'],
@@ -493,6 +491,22 @@ class TcaInline extends AbstractDatabaseRecordProvider implements FormDataProvid
return $liveDefaultId;
}
+ /**
+ * The child-child table name is set in the child TCA "the selector field" and is depending on
+ * the TCA type (select or group) either the "foreign_table" or the (first) "allowed" table.
+ */
+ protected function getChildChildTableName(string $foreignSelector, array $childConfiguration): string
+ {
+ $config = $childConfiguration['processedTca']['columns'][$foreignSelector]['config'] ?? [];
+ $type = $config['type'] ?? '';
+
+ return match ($type) {
+ 'select' => $config['foreign_table'] ?? '',
+ 'group' => GeneralUtility::trimExplode(',', $config['allowed'] ?? '', true)[0] ?? '',
+ default => '',
+ };
+ }
+
protected function getBackendUser(): BackendUserAuthentication
{
return $GLOBALS['BE_USER'];
diff --git a/typo3/sysext/core/Documentation/Changelog/12.4.x/Important-102904-UseTCAGroupFieldAsForeignSelector.rst b/typo3/sysext/core/Documentation/Changelog/12.4.x/Important-102904-UseTCAGroupFieldAsForeignSelector.rst
new file mode 100644
index 0000000000000000000000000000000000000000..173cca39f9dc6f0d9ce9246d4014bb68134284c7
--- /dev/null
+++ b/typo3/sysext/core/Documentation/Changelog/12.4.x/Important-102904-UseTCAGroupFieldAsForeignSelector.rst
@@ -0,0 +1,80 @@
+.. include:: /Includes.rst.txt
+
+.. _important-102904-1706702424:
+
+============================================================
+Important: #102904 - Use TCA group field as foreign selector
+============================================================
+
+See :issue:`102904`
+
+Description
+===========
+
+When using TCA type :php:`inline`, developers have the possibility to use the
+"foreign selector" feature by defining the :php:`foreign_selector` option,
+pointing to a field on the foreign (child) table. This way, editors can
+use the corresponding selector field to choose existing child records,
+to create a new inline relation. This can be further extended, using the
+:php:`useCombination` appearance option, which allows to modify the child record
+via the parent record globally.
+
+The field referenced in :php:`foreign_selector` is usually a field with TCA type
+:php:`select`, using the `foreign_table` option itself to provide the corresponding
+items to choose.
+
+It's nevertheless also possible to use a TCA type :php:`group` field as
+:php:`foreign_selector`. In this case, the child records have to be selected
+from the table, defined via the :php:`allowed` option. For this use case,
+**only one table** can be defined. This means, the first table name in
+:php:`allowed` is taken, no matter if there are multiple table names defined.
+
+.. note::
+
+ This unfortunately does not work out of the box for Extbase. Therefore, the
+ corresponding table has to be defined additionally via the :php:`foreign_table`
+ option. This option is only used as a
+ `workaround <https://docs.typo3.org/m/typo3/reference-tca/main/en-us/ColumnsConfig/Type/Group/Properties/ForeignTable.html>`__
+ by Extbase and is not sufficient for the TYPO3 Form editor, which will always
+ just consider the value from the :php:`allowed` option.
+
+Example using an intermediate table and the :php:`useCombination` feature:
+
+.. code-block:: php
+
+ // Inline field in parent table "tx_extension_inline_usecombination"
+ 'inline' => [
+ 'label' => 'inline',
+ 'config' => [
+ 'type' => 'inline',
+ 'foreign_table' => 'tx_extension_inline_usecombination_mm', // Referencing the intermediate table
+ 'foreign_field' => 'group_parent',
+ 'foreign_selector' => 'group_child',
+ 'foreign_unique' => 'group_child',
+ 'appearance' => [
+ 'useCombination' => true,
+ ],
+ ],
+ ],
+
+ // Reference fields in intermediate table "tx_extension_inline_usecombination_mm"
+ 'group_parent' => [
+ 'label' => 'group parent',
+ 'config' => [
+ 'type' => 'select',
+ 'renderType' => 'selectSingle',
+ 'foreign_table' => 'tx_extension_inline_usecombination', // Referencing the parent table
+ ],
+ ],
+ 'group_child' => [
+ 'label' => 'group child',
+ 'config' => [
+ 'type' => 'group',
+ 'allowed' => 'tx_extension_inline_usecombination_child', // Referencing the child table
+ 'foreign_table' => 'tx_extension_inline_usecombination_child', // ONLY USED FOR extbase!
+ ],
+ ],
+
+ // Child table "tx_extension_inline_usecombination_child" does not have any relation fields
+
+.. index:: Backend, PHP-API, TCA, ext:backend