TYPO3 - Hooks in Extbase Extensions

Hooks in Extbase Extensions

Hinweis: eine Alternative für Extbase Extensions sind die Signal Slots.

Beispiel: Hook beim Löschen eines Datensatzes im Backend

http://stackoverflow.com/questions/25591992/typo3-extbase-individual-code-on-backend-deletion-of-an-object

List view uses TCEmain hooks during its operations, so you can use one of them to intersect delete action, i.e.: processCmdmap_deleteAction

1. Register your hooks class in typo3conf/ext/your_ext/ext_tables.php

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processCmdmapClass'][] = 'VENDORNAME\\YourExt\\Hooks\\ProcessCmdmap';

Create a class with valid namespace and path (according to previous step) file: typo3conf/ext/your_ext/Classes/Hooks/ProcessCmdmap.php

<?php
namespace VENDORNAME\YourExt\Hooks;

class ProcessCmdmap {
   /**
    * hook that is called when an element shall get deleted
    *
    * @param string $table the table of the record
    * @param integer $id the ID of the record
    * @param array $record The accordant database record
    * @param boolean $recordWasDeleted can be set so that other hooks or
    * @param DataHandler $tcemainObj reference to the main tcemain object
    * @return   void
    */
    function processCmdmap_postProcess($command, $table, $id, $value, $dataHandler) {
        if ($command == 'delete' && $table == 'tx_yourext_domain_model_something') {
            // Perform something before real delete
            // You don't need to delete the record here it will be deleted by CMD after the hook
        }
    }
}

Don't forget to clear system cache after registering new hook's class

Verfügbare Hooks: http://typo3.org/api/typo3cms/namespace_t_y_p_o3_1_1_c_m_s_1_1_version_1_1_hook.html