TYPO3 Core

Having the following TCA configuration for a time field, allows to persist data via DataHandler, but then resets the value 00:00:00 to null in FormEngine.

'end_time' => [
  'exclude' => true,
  'label' => 'LLL:EXT:site/Resources/Private/Language/locallang_db.xlf:tx_site_domain_model_eventperformance.end_time',
  'config' => [
    'dbType' => 'time',
    'type' => 'input',
    'renderType' => 'inputDateTime',
    'size' => 12,
    'eval' => 'time,required',
    'default' => null,
  ],
],

• $result['databaseRow'][$column] = '00:00:00'
• $dateTimeFormats[$columnConfig['config']['dbType']]['empty'] = '00:00:00'
• resetting value to null, since the given (correct) value is considered "to be empty"