It is possible to use Location('url'); exit;
Of course execution will stop and nothing gets saved...but then I loose the error-message, this wil not be displayed...
There must be a more graceful (seblod) way to prevent saving a content-item.
Anybody?
This is the case:
// in before-store field:
check-existence();
if-exist{
stop here, show warning/error (how to do this)
} else {
continu saving
}
You could use joomla redirect that displays a message, same way joomla does if there is no access:
JFactory::getApplication()->redirect('someurl', 'some message', 'message type e.g. error');
Thanks Klas, this works indeed.
I'll use this solution until I have my copy of ajax-validation up and running.
I'll post about that in the plugin-forum.
Thank again Klas for helping me (and the community).
regards
To be complete, this is my current code:
$db = JFactory::getDbo();
$query = $db->getQuery(true);
$query->select('COUNT(*)');
$query->from($db->quoteName('#__cck_mytablename'));
$query->where($db->quoteName('dnt_trid') ." = " . $fields['dnt_trid']->value . " AND " . $db->quoteName('dnt_user') ." = " . $fields['dnt_user']->value);
// Reset the query using our newly populated query object.
$db->setQuery($query);
$count = $db->loadResult();
// warning if record(s) found
if($count > 0){
// throw error
$error = "Deze deelnemer is reeds aan dit traject gekoppeld!";
JFactory::getApplication()->redirect($fields['sysdisplayfield']->value, $error, 'warning');
}