why we can not delete root user group?

[saman2]

hi
i create some usergroup in joomla that has not parent. how can i remove this type of usergroup.
what is goal of this syntax:
https://github.com/joomlatools/joomlato ... p.php#L165

[toivo]

Your github link points to code from the Joomlatools framework, available from http://joomlatools.com. Joomlatools is an extension developer. If your question relates to one of their extensions or source code, you should study their documentation or ask the question at their support forum.

[saman2]

excuse me toivo and thank you for your help...i have some mistake and please forget my github link...look at my problem:

I used these codes to build the Joomla group:

Code: Select all

$app = JFactory::getApplication();
$groupTitle = .....;
$parent = .....;

if (!empty($groupTitle)) {
   $usergroupTable = JTable::getInstance('UserGroup', 'JTable');

   $mydata = array(
      'id' => 0,
      'title' => $groupTitle,
      'parent_id' => $parent[0],
      'tags' => null
   );
   if (!$usergroupTable->bind($mydata)) {
    $app->enqueueMessage("Bind failed: " . $usergroupTable->getError());
      return false;
   }
   if (!$usergroupTable->check()) {
      $app->enqueueMessage("check failed: " . $usergroupTable->getError());
      return false;
   }
   if (!$usergroupTable->store()) {
      $app->enqueueMessage("store failed: " . $usergroupTable->getError());
      return false;
   }
    $app->enqueueMessage("group created " . $groupTitle);
    return true;
}
$app->enqueueMessage("no empty group created");

My script uses these codes to create user groups that have no parent. How can I delete them? When i want remove through back-end, joomla return to me erorr: Root categories cannot be deleted.
Would not it be a problem if I started using the database?