[TYPO3-mvc] Configuration/TCA/Overrides not working

[Matthew Colton]

Hi all,
I'm trying to add an extra table and an extra field to an existing
table. It is no problem to add an extra table. But my effort to add an
extra field to an existing table fails.

Well, actually it works as long as I ignore the Typo3 Extbase guidelines. :)

The following works fails in
  Configuration/TCA/Overrides/tx_cal_location.php
but works in
  ext_tables.php:

***********************************************************

$calDistrictTempColumns = array(
  'tx_calext_district_id' => array(
    'exclude' => 0,
    'label' =>
'LLL:EXT:calext/Resources/Private/Language/locallang_db.xlf:tx_cal_location.tx_calext_district_id',

    'config' => array(
      'type' => 'select',
      'items' => array(
        array('', 0),
      ),
      'foreign_table' => 'tx_calext_domain_model_district',
      'foreign_table_where' => '',
      'size' => 1,
      'minitems' => 0,
      'maxitems' => 1,
    )
  ),
);

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns(
  'tx_cal_location',
  $calDistrictTempColumns,
  TRUE
);

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes(
  'tx_cal_location',
  'tx_calext_district_id'
);

***********************************************************

Any ideas why this fails?

Thanks in advance,
Mat