.. include:: /Includes.rst.txt .. _columns-check-properties-validation: ========== validation ========== .. confval:: validation :name: check-validation :Path: $GLOBALS['TCA'][$table]['columns'][$field]['config'] :type: array :Scope: Proc. Values for the :ref:`eval ` rules. The keys of the array must correspond to the keyword of the related evaluation rule. For :code:`maximumRecordsChecked` and :code:`maximumRecordsCheckedInPid` the value is expected to be an integer. Examples ======== .. _tca_example_checkbox_8: Only one record can be checked =============================== In the example below, only one record from the same table will be allowed to have that particular box checked. .. include:: /Images/Rst/Checkbox8.rst.txt .. include:: /CodeSnippets/Checkbox8.rst.txt