[TYPO3-german] adding TCA checkbox fields depending on record type?

[bernd wilke]

I add further checkboxes to pages (which already works), which are 
restricted to special page types.

but now I should add one of these three checkboxes I add to normal 
pages, to pages of type 'external url'.

so for normal pages there should be:
additional Options for normal pages:
[ ] option1 [ ] option2 [ ] option3

and for pages of type Shortcut to external URL there should be:
additional option for external-URL-pages:
[ ] option2

Is there a way to use the bit2 just for type 3 records (external URL)?

this might cause to have two TCA definitions for the same DB-field?
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::
addToAllTCAtypes('pages','tx_myext_flags1;;;;1-1-1','1,2','after:description');
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::
addToAllTCAtypes('pages','tx_myext_flags1b;;;;1-1-1','3','after:url');

but that are fielddefinitions for fieldnames (so the 2nd variant does 
not exists as an own db-field).

$tempColumns = array(
   'tx_myext_flags1' => array(
     'exclude' => 1,
     'label' => 'LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1',
     'config' => array(
       'type' => 'check',
       'cols' => 5,
       'items' => array(
 
array('LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1.I.0', '0'),
 
array('LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1.I.1', '1'),
 
array('LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1.I.2', '2'),
       ),
     )
   ),
   'tx_myext_flags1b' => array(
     'exclude' => 1,
     'label' => 'LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1b',
     'config' => array(
       'type' => 'check',
       'cols' => 5,
       'items' => array(
	array('LLL:EXT:myext/locallang_db.xml:pages.tx_myext_flags1.I.1', '1'),
       ),
     ),
   ),
);


is there a solution with redefining the fieldusage or need I introduce 
another field for this ckeckbox?


bernd
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