Bug #88624
Updated by Markus Klein over 5 years ago
Due to undefined [config][items] of renderType=selectTree a PHP Warning is issued: <pre> #1476107295: PHP Warning: array_column() expects parameter 1 to be array, null given in typo3_src_8.7/typo3/sysext/backend/Classes/Form/FormDataProvider/TcaRecordTitle.php line 241 </pre> The reason is that no FormDataProvider is generating the @items@ array for a tree (only for all other types of select elements). A cheap workaround is to add an empty @items@ array to the TCA: <pre> 'category' => [ 'exclude' => false, 'label' => 'Foo', 'config' => [ 'type' => 'select', 'renderType' => 'selectTree', 'foreign_table' => 'sys_category', 'foreign_table_where' => 'AND sys_category.pid IN (###PAGE_TSCONFIG_IDLIST###) AND sys_category.sys_language_uid IN (-1, 0) ORDER BY sys_category.sorting ASC', 'items' => [], 'minitems' => 1, 'maxitems' => 1, 'treeConfig' => [ 'parentField' => 'parent', 'appearance' => [ 'expandAll' => true, 'showHeader' => true, 'maxLevels' => 2, 'nonSelectableLevels' => '0,1' ], ] ], ], </pre> The core needs a fix to handle the missing items array correctly. We face this issue with a custom extension that uses this TCA inside a record that is nested with IRRE in the main record. Main record: project Nested record: assignment (relation to project and to sys_category)