[TYPO3-dev] Change TCA eval based on type?

[Neil Bertram]

Hi,

Is there currently a way to override TCA "columns" entries based on the 
"types"? I would specifically like to set the eval field...

What I have is a table with lots of fields, and also many "types" based 
on a select. Depending on the type selected, I would like certain fields 
to become mandatory and others optional. I can't find a way to do this 
currently...

If this is a feature that doesn't exist, I'm happy to work on a core 
patch to allow an overlay of columns from within types, eg:

$TCA['footable'] = array(
    ...
    'columns' => array(
          'colname' => array(
              'label' => 'foo',
              'config' => array(
                  'type' => 'input',
                  'size' => '20'
              )
          )
     )
    'types' => array('0' => array(
         'showitem' => 'colname',
         'columnoverlay' => array(
              'config' => array(
                  'size' => '50',
                  'eval' => 'required'
              )
         )
    )
)


Does this sound generally useful?



Neil