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. /** * This is filter is used to see which students are enroled on any courses * * @package core_user * @copyright 2014 Krister Viirsaar * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); /** * User filter to distinguish users with no or any enroled courses. * @copyright 2014 Krister Viirsaar * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class user_filter_anycourses extends user_filter_yesno { /** * Returns the condition to be used with SQL * * @param array $data filter settings * @return array sql string and $params */ public function get_sql_filter($data) { $value = $data['value']; $not = $value ? '' : 'NOT'; return array("EXISTS ( SELECT userid FROM {user_enrolments} ) AND " . " id $not IN ( SELECT userid FROM {user_enrolments} )", array()); } }