How to set a date field limitation

Hi Andreas,

I think the most effective way to accomplish this would be to set up some error checking in a plugin using the record_presave hook. This would let you prevent a record from saving if it doesn't meet the constraints you provide. Using this hook would look something like this:

<?php
addAction('record_presave', 'your_presave_function', null, 3);
function your_presave_function($tableName, $isNewRecord, $oldRecord) {

  if ($tableName == 'your_table_name') {
    $formValues = _getRecordValuesFromFormInput();
    
    if (strtotime($formValues['later_date_fieldname']) < strtotime($formValues['earlier_date_fieldname'])) {
      echo 'Error Message';
      exit;
    }

  }

}
?>

With this solution, you will need to set up your own date constraint conditions - I've given an example of how to require one date field to be "greater" than another, though you would still need to substitute the correct table/field names. This code would need to be in an active plugin to be executed by the CMS - there should be an example plugin by default in all CMSB installations called "samplePlugin.php"

Let me know if this helps, or if you have any other questions!

Thanks,